def main(args): global FwdPrimer, RevPrimer, SampleData, Barcodes, RevBarcodes, tmpdir, usearch parser=argparse.ArgumentParser(prog='amptk-process_ion.py', usage="%(prog)s [options] -i file.fastq\n%(prog)s -h for help menu", description='''Script finds barcodes, strips forward and reverse primers, relabels, and then trim/pads reads to a set length''', epilog="""Written by Jon Palmer (2015) [email protected]""", formatter_class=MyFormatter) parser.add_argument('-i','--fastq', dest='fastq', required=True, help='FASTQ R1 file') parser.add_argument('--reverse', help='Illumina R2 reverse reads') parser.add_argument('-o','--out', dest="out", default='illumina2', help='Base name for output') parser.add_argument('-f','--fwd_primer', dest="F_primer", default='fITS7', help='Forward Primer') parser.add_argument('-r','--rev_primer', dest="R_primer", default='ITS4', help='Reverse Primer') parser.add_argument('-m','--mapping_file', help='Mapping file: QIIME format can have extra meta data columns') parser.add_argument('-p','--pad', default='off', choices=['on', 'off'], help='Pad with Ns to a set length') parser.add_argument('--primer_mismatch', default=2, type=int, help='Number of mis-matches in primer') parser.add_argument('--barcode_mismatch', default=0, type=int, help='Number of mis-matches in barcode') parser.add_argument('--barcode_fasta', help='FASTA file containing Barcodes (Names & Sequences)') parser.add_argument('--barcode_not_anchored', action='store_true', help='Barcodes (indexes) are not at start of reads') parser.add_argument('--reverse_barcode', help='FASTA file containing 3 prime Barocdes') parser.add_argument('--min_len', default=100, type=int, help='Minimum read length to keep') parser.add_argument('-l','--trim_len', default=300, type=int, help='Trim length for reads') parser.add_argument('--full_length', action='store_true', help='Keep only full length reads (no trimming/padding)') parser.add_argument('--merge_method', default='usearch', choices=['usearch', 'vsearch'], help='Software to use for PE read merging') parser.add_argument('--cpus', type=int, help="Number of CPUs. Default: auto") parser.add_argument('-u','--usearch', dest="usearch", default='usearch9', help='USEARCH EXE') args=parser.parse_args(args) args.out = re.sub(r'\W+', '', args.out) log_name = args.out + '.amptk-demux.log' if os.path.isfile(log_name): os.remove(log_name) FNULL = open(os.devnull, 'w') amptklib.setupLogging(log_name) cmd_args = " ".join(sys.argv)+'\n' amptklib.log.debug(cmd_args) print("-------------------------------------------------------") #initialize script, log system info and usearch version amptklib.SystemInfo() #Do a version check usearch = args.usearch amptklib.versionDependencyChecks(usearch) #get number of CPUs to use if not args.cpus: cpus = multiprocessing.cpu_count() else: cpus = args.cpus #parse a mapping file or a barcode fasta file, primers, etc get setup #dealing with Barcodes, get ion barcodes or parse the barcode_fasta argument barcode_file = args.out + ".barcodes_used.fa" rev_barcode_file = args.out + '.revbarcodes_used.fa' amptklib.SafeRemove(barcode_file) amptklib.SafeRemove(rev_barcode_file) #check if mapping file passed, use this if present, otherwise use command line arguments SampleData = {} Barcodes = {} RevBarcodes = {} FwdPrimer = '' RevPrimer = '' if args.mapping_file: if not os.path.isfile(args.mapping_file): amptklib.log.error("Mapping file not found: %s" % args.mapping_file) sys.exit(1) SampleData, Barcodes, RevBarcodes, FwdPrimer, RevPrimer = amptklib.parseMappingFileNEW(args.mapping_file) else: #no mapping file, so create dictionaries from barcode fasta files if not args.barcode_fasta: amptklib.log.error("You did not specify a --barcode_fasta or --mapping_file, one is required") sys.exit(1) else: shutil.copyfile(args.barcode_fasta, barcode_file) Barcodes = amptklib.fasta2barcodes(barcode_file, False) if args.reverse_barcode: shutil.copyfile(args.reverse_barcode, rev_barcode_file) RevBarcodes = amptklib.fasta2barcodes(rev_barcode_file, False) #parse primers here so doesn't conflict with mapping primers #look up primer db otherwise default to entry if args.F_primer in amptklib.primer_db: FwdPrimer = amptklib.primer_db.get(args.F_primer) amptklib.log.info("{:} fwd primer found in AMPtk primer db, setting to: {:}".format(args.F_primer, FwdPrimer)) else: FwdPrimer = args.F_primer amptklib.log.info("{:} fwd primer not found in AMPtk primer db, assuming it is actual primer sequence.".format(args.F_primer)) if args.R_primer in amptklib.primer_db: RevPrimer = amptklib.primer_db.get(args.R_primer) amptklib.log.info("{:} rev primer found in AMPtk primer db, setting to: {:}".format(args.R_primer, RevPrimer)) else: RevPrimer = args.R_primer amptklib.log.info("{:} rev primer not found in AMPtk primer db, assuming it is actual primer sequence.".format(args.R_primer)) #check if input is compressed gzip_list = [] if args.fastq.endswith('.gz'): gzip_list.append(os.path.abspath(args.fastq)) if args.reverse: if args.reverse.endswith('.gz'): gzip_list.append(os.path.abspath(args.reverse)) if gzip_list: amptklib.log.info("Gzipped input files detected, uncompressing") for file in gzip_list: file_out = file.replace('.gz', '') amptklib.Funzip(file, file_out, cpus) args.fastq = args.fastq.replace('.gz', '') if args.reverse: args.reverse = args.reverse.replace('.gz', '') #Count FASTQ records amptklib.log.info("Loading FASTQ Records") orig_total = amptklib.countfastq(args.fastq) size = amptklib.checkfastqsize(args.fastq) readablesize = amptklib.convertSize(size*2) amptklib.log.info('{:,} reads ({:})'.format(orig_total, readablesize)) #output barcodes/samples amptklib.log.info('Searching for {:} forward barcodes and {:} reverse barcodes'.format(len(Barcodes), len(RevBarcodes))) #create tmpdir and split input into n cpus tmpdir = args.out.split('.')[0]+'_'+str(os.getpid()) if not os.path.exists(tmpdir): os.makedirs(tmpdir) #tell user about number of cores using amptklib.log.info("Splitting FASTQ files over {:} cpus".format(cpus)) if args.reverse: amptklib.log.info("Demuxing PE Illumina reads; FwdPrimer: {:} RevPrimer: {:}".format(FwdPrimer, RevPrimer)) else: amptklib.log.info("Demuxing SE Illumina reads; FwdPrimer: {:} RevPrimer: {:}".format(FwdPrimer, amptklib.RevComp(RevPrimer))) amptklib.log.info('Dropping reads less than {:} bp and setting lossless trimming to {:} bp.'.format(args.min_len, args.trim_len)) if cpus > 1: if args.reverse: amptklib.split_fastqPE(args.fastq, args.reverse, orig_total, tmpdir, cpus*4) file_list = [] for file in os.listdir(tmpdir): if file.endswith('.fq'): filepart = os.path.join(tmpdir, file.split('_R')[0]) if not filepart in file_list: file_list.append(filepart) amptklib.runMultiProgress(processReadsPE, file_list, cpus, args=args) else: #split fastq file amptklib.split_fastq(args.fastq, orig_total, tmpdir, cpus*4) #now get file list from tmp folder file_list = [] for file in os.listdir(tmpdir): if file.endswith(".fq"): file = os.path.join(tmpdir, file) file_list.append(file) #finally process reads over number of cpus amptklib.runMultiProgress(processRead, file_list, cpus, args=args) else: if args.reverse: shutil.copyfile(args.fastq, os.path.join(tmpdir, 'chunk_R1.fq')) shutil.copyfile(args.reverse, os.path.join(tmpdir, 'chunk_R2.fq')) processReadsPE(os.path.join(tmpdir, 'chunk'), args=args) else: shutil.copyfile(args.fastq, os.path.join(tmpdir, 'chunk.fq')) processRead(os.path.join(tmpdir, 'chunk.fq'), args=args) print("-------------------------------------------------------") #Now concatenate all of the demuxed files together amptklib.log.info("Concatenating Demuxed Files") tmpDemux = args.out + '.tmp.demux.fq' with open(tmpDemux, 'w') as outfile: for filename in glob.glob(os.path.join(tmpdir,'*.demux.fq')): if filename == tmpDemux: continue with open(filename, 'r') as readfile: shutil.copyfileobj(readfile, outfile) if args.reverse: #parse the stats finalstats = [0,0,0,0,0,0] for file in os.listdir(tmpdir): if file.endswith('.stats'): with open(os.path.join(tmpdir, file), 'r') as statsfile: line = statsfile.readline() line = line.rstrip() newstats = line.split(',') newstats = [int(i) for i in newstats] for x, num in enumerate(newstats): finalstats[x] += num amptklib.log.info('{0:,}'.format(finalstats[0])+' total reads') amptklib.log.info('{0:,}'.format(finalstats[0]-finalstats[1]-finalstats[3])+' valid Barcodes') amptklib.log.info('{0:,}'.format(finalstats[5])+' valid output reads (Barcodes and Primers)') else: #parse the stats finalstats = [0,0,0,0,0,0,0] for file in os.listdir(tmpdir): if file.endswith('.stats'): with open(os.path.join(tmpdir, file), 'r') as statsfile: line = statsfile.readline() line = line.rstrip() newstats = line.split(',') newstats = [int(i) for i in newstats] for x, num in enumerate(newstats): finalstats[x] += num amptklib.log.info('{0:,}'.format(finalstats[0])+' total reads') if args.reverse_barcode: amptklib.log.info('{0:,}'.format(finalstats[0]-finalstats[1]-finalstats[2]-finalstats[4])+' valid Fwd and Rev Barcodes') else: amptklib.log.info('{0:,}'.format(finalstats[0]-finalstats[1])+' valid Barcode') amptklib.log.info('{0:,}'.format(finalstats[0]-finalstats[1]-finalstats[2])+' Fwd Primer found, {0:,}'.format(finalstats[3])+ ' Rev Primer found') amptklib.log.info('{0:,}'.format(finalstats[5])+' discarded too short (< %i bp)' % args.min_len) amptklib.log.info('{0:,}'.format(finalstats[6])+' valid output reads') #clean up tmp folder amptklib.SafeRemove(tmpdir) #last thing is to re-number of reads as it is possible they could have same name from multitprocessor split catDemux = args.out+'.demux.fq' amptklib.fastqreindex(tmpDemux, catDemux) amptklib.SafeRemove(tmpDemux) #now loop through data and find barcoded samples, counting each..... BarcodeCount = {} with open(catDemux, 'r') as input: header = itertools.islice(input, 0, None, 4) for line in header: ID = line.split("=",1)[-1].split(";")[0] if ID not in BarcodeCount: BarcodeCount[ID] = 1 else: BarcodeCount[ID] += 1 #now let's count the barcodes found and count the number of times they are found. barcode_counts = "%22s: %s" % ('Sample', 'Count') for k,v in natsorted(list(BarcodeCount.items()), key=lambda k_v: k_v[1], reverse=True): barcode_counts += "\n%22s: %s" % (k, str(BarcodeCount[k])) amptklib.log.info("Found %i barcoded samples\n%s" % (len(BarcodeCount), barcode_counts)) genericmapfile = args.out + '.mapping_file.txt' if not args.mapping_file: #create a generic mappingfile for downstream processes amptklib.CreateGenericMappingFile(Barcodes, RevBarcodes, FwdPrimer, RevPrimer, genericmapfile, BarcodeCount) else: amptklib.updateMappingFile(args.mapping_file, BarcodeCount, genericmapfile) #compress the output to save space FinalDemux = catDemux+'.gz' amptklib.Fzip(catDemux, FinalDemux, cpus) amptklib.removefile(catDemux) if gzip_list: for file in gzip_list: file = file.replace('.gz', '') amptklib.removefile(file) #get file size filesize = os.path.getsize(FinalDemux) readablesize = amptklib.convertSize(filesize) amptklib.log.info("Output file: %s (%s)" % (FinalDemux, readablesize)) amptklib.log.info("Mapping file: %s" % genericmapfile) print("-------------------------------------------------------") if 'darwin' in sys.platform: print(col.WARN + "\nExample of next cmd: " + col.END + "amptk cluster -i %s -o out\n" % (FinalDemux)) else: print("\nExample of next cmd: amptk cluster -i %s -o out\n" % (FinalDemux))
def main(args):
global FwdPrimer, RevPrimer, usearch
parser = argparse.ArgumentParser(
prog='amptk-process_illumina_folder.py',
usage="%(prog)s [options] -i folder",
description=
'''Script that takes De-mulitplexed Illumina data from a folder and processes it for amptk (merge PE reads, strip primers, trim/pad to set length.''',
epilog="""Written by Jon Palmer (2015) [email protected]""",
formatter_class=MyFormatter)
parser.add_argument('-i',
'--input',
dest='input',
required=True,
help='Folder of Illumina Data')
parser.add_argument('-o',
'--out',
dest="out",
default='amptk-illumina',
help='Name for output folder')
parser.add_argument(
'-m',
'--mapping_file',
help='Mapping file: QIIME format can have extra meta data columns')
parser.add_argument('--reads',
dest="reads",
default='paired',
choices=['paired', 'forward'],
help='PE or forward reads')
parser.add_argument('--read_length',
type=int,
help='Read length, i.e. 2 x 300 bp = 300')
parser.add_argument('-f',
'--fwd_primer',
dest="F_primer",
default='fITS7',
help='Forward Primer (fITS7)')
parser.add_argument('-r',
'--rev_primer',
dest="R_primer",
default='ITS4',
help='Reverse Primer (ITS4)')
parser.add_argument('--require_primer',
dest="primer",
default='on',
choices=['on', 'off'],
help='Require Fwd primer to be present')
parser.add_argument('--primer_mismatch',
default=2,
type=int,
help='Number of mis-matches in primer')
parser.add_argument('--barcode_mismatch',
default=1,
type=int,
help='Number of mis-matches allowed in index')
parser.add_argument('--rescue_forward',
default='on',
choices=['on', 'off'],
help='Rescue Not-merged forward reads')
parser.add_argument('--min_len',
default=100,
type=int,
help='Minimum read length to keep')
parser.add_argument('--merge_method',
default='usearch',
choices=['usearch', 'vsearch'],
help='Software to use for PE read merging')
parser.add_argument('-l',
'--trim_len',
default=300,
type=int,
help='Trim length for reads')
parser.add_argument('--cpus',
type=int,
help="Number of CPUs. Default: auto")
parser.add_argument(
'--full_length',
action='store_true',
help='Keep only full length reads (no trimming/padding)')
parser.add_argument('-p',
'--pad',
default='off',
choices=['on', 'off'],
help='Pad with Ns to a set length')
parser.add_argument('-u',
'--usearch',
dest="usearch",
default='usearch9',
help='USEARCH executable')
parser.add_argument(
'--sra',
action='store_true',
help='Input files are from NCBI SRA not direct from illumina')
parser.add_argument('--cleanup',
action='store_true',
help='Delete all intermediate files')
args = parser.parse_args(args)
#sometimes people add slashes in the output directory, this could be bad, try to fix it
args.out = re.sub(r'\W+', '', args.out)
#create directory and check for existing logfile
if not os.path.exists(args.out):
os.makedirs(args.out)
log_name = args.out + '.amptk-demux.log'
if os.path.isfile(log_name):
os.remove(log_name)
amptklib.setupLogging(log_name)
FNULL = open(os.devnull, 'w')
cmd_args = " ".join(sys.argv) + '\n'
amptklib.log.debug(cmd_args)
print("-------------------------------------------------------")
#initialize script, log system info and usearch version
amptklib.SystemInfo()
#get version of amptk
usearch = args.usearch
amptklib.versionDependencyChecks(usearch)
#Now all the data is in folder args.out that needs to be de-multiplexed
if not args.cpus:
cpus = multiprocessing.cpu_count()
else:
cpus = args.cpus
#check folder if files are gzipped, then gunzip them
#try to gunzip files
gzip_list = []
for file in os.listdir(args.input):
if file.endswith(".fastq.gz"):
gzip_list.append(file)
if gzip_list:
amptklib.log.info("Gzipped files detected, uncompressing")
for file in gzip_list:
amptklib.log.debug("Uncompressing %s" % file)
OutName = os.path.join(args.input, os.path.splitext(file)[0])
amptklib.Funzip(os.path.join(args.input, file), OutName, cpus)
#check for mapping file, if exists, then use names from first column only for filenames
SampleData = {}
Barcodes = {}
RevBarcodes = {}
FwdPrimer = ''
RevPrimer = ''
if args.mapping_file:
if not os.path.isfile(args.mapping_file):
amptklib.error("Mapping file is not valid: %s" % args.mapping_file)
sys.exit(1)
SampleData, Barcodes, RevBarcodes, FwdPrimer, RevPrimer = amptklib.parseMappingFileNEW(
args.mapping_file)
mapdata = amptklib.parseMappingFileIllumina(args.mapping_file)
#forward primer in first item in tuple, reverse in second
sample_names = list(SampleData.keys())
#loop through the files in the folder and get the ones in the sample_names lit
filenames = []
for file in os.listdir(args.input):
if file.startswith(tuple(sample_names)):
if file.endswith('.fastq'):
filenames.append(file)
if len(filenames) < 1:
amptklib.log.error(
"Found 0 valid files from mapping file. Mapping file SampleID must match start of filenames"
)
sys.exit(1)
else: #if not then search through and find all the files you can in the folder
'''get filenames, store in list, Illumina file names look like the following:
<sample name>_<i5>-<i7>_L<lane (0-padded to 3 digits)>_R<read number>_<set number (0-padded to 3 digits>.fastq.gz'''
#now get the FASTQ files and proceed
filenames = []
for file in os.listdir(args.input):
if file.endswith(".fastq"):
filenames.append(file)
#look up primer db otherwise default to entry
if args.F_primer in amptklib.primer_db:
FwdPrimer = amptklib.primer_db.get(args.F_primer)
amptklib.log.info(
"{:} fwd primer found in AMPtk primer db, setting to: {:}".
format(args.F_primer, FwdPrimer))
else:
FwdPrimer = args.F_primer
amptklib.log.info(
"{:} fwd primer not found in AMPtk primer db, assuming it is actual primer sequence."
.format(args.F_primer))
if args.R_primer in amptklib.primer_db:
RevPrimer = amptklib.primer_db.get(args.R_primer)
amptklib.log.info(
"{:} rev primer found in AMPtk primer db, setting to: {:}".
format(args.R_primer, RevPrimer))
else:
RevPrimer = args.R_primer
amptklib.log.info(
"{:} rev primer not found in AMPtk primer db, assuming it is actual primer sequence."
.format(args.R_primer))
#if files are from SRA, then do something different as they are already merged
if args.sra:
#take list of filenames, move over to output folder
sampleDict = {}
fastq_for = []
for x in filenames:
rename = os.path.basename(x).split(".f", -1)[0]
sampleDict[rename] = 'unknown'
shutil.copyfile(os.path.join(args.input, x),
os.path.join(args.out, rename + '.fq'))
fastq_for.append(os.path.join(args.out, rename + '.fq'))
args.reads = 'forward'
else:
if len(filenames) % 2 != 0:
print(
"Check your input files, they do not seem to be properly paired"
)
sys.exit(1)
#check list for files, i.e. they need to have _R1 and _R2 in the filenames, otherwise throw exception
if not any('_R1' in x for x in filenames):
amptklib.log.error(
"Did not find valid FASTQ files. Your files must have _R1 and _R2 in filename, rename your files and restart script."
)
sys.exit(1)
uniq_names = []
fastq_for = []
fastq_rev = []
sampleDict = {}
map = args.out + '.filenames.txt'
with open(map, 'w') as map_file:
map_file.write("Name\t[i5]\t[i7]\tLane\tSet_num\n")
for item in sorted(filenames):
if '_R1' in item:
fastq_for.append(os.path.join(args.input, item))
if '_R2' in item:
fastq_rev.append(os.path.join(args.input, item))
column = item.split("_")
if column[0] not in uniq_names:
uniq_names.append(column[0])
if "-" in column[1]:
barcode = column[1].split(
"-"
) #looking here for the linker between i5 and i7 seqs
i5 = barcode[0]
i7 = barcode[1]
try:
map_file.write("%s\t%s\t%s\t%s\t%s\n" %
(column[0], i5, i7, column[2],
column[4].split(".", 1)[0]))
except IndexError:
amptklib.log.debug(
"Non-standard names detected, skipping mapping file"
)
else:
i5 = column[1]
i7 = "None"
try:
map_file.write("%s\t%s\t%s\t%s\t%s\n" %
(column[0], i5, i7, column[2],
column[4].split(".", 1)[0]))
except IndexError:
amptklib.log.debug(
"Non-standard names detected, skipping mapping file"
)
if i7 != "None":
sampleDict[column[0]] = i5 + '-' + i7
else:
sampleDict[column[0]] = i5
if args.full_length and args.primer == 'off':
amptklib.log.info(
'--full_length is not compatible with --require_primer off, turning --full_length off'
)
args.full_length = False
#tell user about number of cores using
amptklib.log.info('Demuxing data using {:} cpus'.format(cpus))
amptklib.log.info(
'Dropping reads less than {:} bp and setting lossless trimming to {:} bp.'
.format(args.min_len, args.trim_len))
#zip read lists into a single list of tuples
if args.reads == 'paired':
amptklib.log.info(
"Strip Primers and Merge PE reads. FwdPrimer: {:} RevPrimer: {:}".
format(FwdPrimer, RevPrimer))
readList = list(zip(fastq_for, fastq_rev))
amptklib.runMultiProgress(safe_run, readList, cpus, args=args)
else:
amptklib.log.info(
"Strip Primers. FwdPrimer: {:} RevPrimer: {:}".format(
FwdPrimer, RevPrimer))
amptklib.runMultiProgress(safe_run2, fastq_for, cpus, args=args)
#cleanup to save space
if gzip_list:
for file in gzip_list:
file = file.replace('.gz', '')
amptklib.removefile(os.path.join(args.input, file))
print("-------------------------------------------------------")
#Now concatenate all of the demuxed files together
amptklib.log.info("Concatenating Demuxed Files")
catDemux = args.out + '.demux.fq'
with open(catDemux, 'w') as outfile:
for filename in glob.glob(os.path.join(args.out, '*.demux.fq')):
if filename == catDemux:
continue
with open(filename, 'r') as readfile:
shutil.copyfileobj(readfile, outfile)
#parse the stats
#(Total, ForPrimerFound, RevPrimerFound, multiHits, TooShort, ValidSeqs))
finalstats = [0, 0, 0, 0, 0, 0]
for file in os.listdir(args.out):
if file.endswith('.stats'):
with open(os.path.join(args.out, file), 'r') as statsfile:
line = statsfile.readline()
line = line.replace('\n', '')
newstats = line.split(',')
newstats = [int(i) for i in newstats]
for x, num in enumerate(newstats):
finalstats[x] += num
amptklib.log.info('{0:,}'.format(finalstats[0]) + ' total reads')
amptklib.log.info('{0:,}'.format(finalstats[1]) +
' Fwd Primer found, {0:,}'.format(finalstats[2]) +
' Rev Primer found')
amptklib.log.info('{0:,}'.format(finalstats[3]) +
' discarded Primer incompatibility')
amptklib.log.info('{0:,}'.format(finalstats[4]) +
' discarded too short (< %i bp)' % args.min_len)
amptklib.log.info('{0:,}'.format(finalstats[5]) + ' valid output reads')
#now loop through data and find barcoded samples, counting each.....
BarcodeCount = {}
with open(catDemux, 'r') as input:
header = itertools.islice(input, 0, None, 4)
for line in header:
ID = line.split("=")[-1].split(";")[0]
if ID not in BarcodeCount:
BarcodeCount[ID] = 1
else:
BarcodeCount[ID] += 1
#now let's count the barcodes found and count the number of times they are found.
barcode_counts = "%30s: %s" % ('Sample', 'Count')
for k, v in natsorted(list(BarcodeCount.items()),
key=lambda k_v: k_v[1],
reverse=True):
barcode_counts += "\n%30s: %s" % (k, str(BarcodeCount[k]))
amptklib.log.info("Found %i barcoded samples\n%s" %
(len(BarcodeCount), barcode_counts))
genericmapfile = args.out + '.mapping_file.txt'
if not args.mapping_file:
#create a generic mappingfile for downstream processes
amptklib.CreateGenericMappingFileIllumina(sampleDict, FwdPrimer,
RevPrimer, genericmapfile,
BarcodeCount)
else:
amptklib.updateMappingFile(args.mapping_file, BarcodeCount,
genericmapfile)
#compress the output to save space
FinalDemux = catDemux + '.gz'
amptklib.Fzip(catDemux, FinalDemux, cpus)
amptklib.removefile(catDemux)
#get file size
filesize = os.path.getsize(FinalDemux)
readablesize = amptklib.convertSize(filesize)
amptklib.log.info("Output file: %s (%s)" % (FinalDemux, readablesize))
amptklib.log.info("Mapping file: %s" % genericmapfile)
if args.cleanup:
shutil.rmtree(args.out)
print("-------------------------------------------------------")
if 'darwin' in sys.platform:
print(col.WARN + "\nExample of next cmd: " + col.END +
"amptk cluster -i %s -o out\n" % (FinalDemux))
else:
print("\nExample of next cmd: amptk cluster -i %s -o out\n" %
(FinalDemux))
def main(args):
parser = argparse.ArgumentParser(
prog='amptk-filter.py',
description='''Script inspects output of amptk-OTU_cluster.py and
determines useful threshold for OTU output based on a spike-in
mock community.''',
epilog="""Written by Jon Palmer (2015) [email protected]""",
formatter_class=MyFormatter)
parser.add_argument('-i',
'--otu_table',
required=True,
help='Input OTU table')
parser.add_argument('-f',
'--fasta',
required=True,
help='Input OTUs (multi-fasta)')
parser.add_argument('-b',
'--mock_barcode',
help='Barocde of Mock community')
parser.add_argument('-p',
'--index_bleed',
help='Index Bleed filter. Default: auto')
parser.add_argument('-t',
'--threshold',
default='max',
choices=['sum', 'max', 'top25', 'top10', 'top5'],
help='Threshold to use when calculating index-bleed')
parser.add_argument(
'-c',
'--calculate',
default='all',
choices=['all', 'in'],
help='Calculate index-bleed, if synthetic mock use all otherwise use in'
)
parser.add_argument('-s',
'--subtract',
default=0,
help='Threshold to subtract')
parser.add_argument('-n',
'--normalize',
default='y',
choices=['y', 'n'],
help='Normalize OTU table prior to filtering')
parser.add_argument('-m', '--mc', help='Multi-FASTA mock community')
parser.add_argument(
'-d',
'--drop',
nargs='+',
help='samples to drop from table after index-bleed filtering')
parser.add_argument('--ignore',
nargs='+',
help='Ignore OTUs during index-bleed')
parser.add_argument('--delimiter',
default='tsv',
choices=['csv', 'tsv'],
help='Delimiter')
parser.add_argument('--col_order',
nargs='+',
dest="col_order",
help='Provide space separated list')
parser.add_argument('--keep_mock',
action='store_true',
help='Keep mock sample in OTU table (Default: False)')
parser.add_argument('--show_stats',
action='store_true',
help='Show stats datatable STDOUT')
parser.add_argument('--negatives',
nargs='+',
help='Negative Control Sample names')
parser.add_argument('-o', '--out', help='Base output name')
parser.add_argument('--min_reads_otu',
default=2,
type=int,
help='Minimum number of reads per OTU for experiment')
parser.add_argument(
'--min_samples_otu',
default=1,
type=int,
help='Minimum number of samples per OTU for experiment')
parser.add_argument('-u',
'--usearch',
dest="usearch",
default='usearch9',
help='USEARCH9 EXE')
parser.add_argument('--debug',
action='store_true',
help='Remove Intermediate Files')
args = parser.parse_args(args)
parentdir = os.path.join(os.path.dirname(amptklib.__file__))
if not args.out:
#get base name of files
base = args.otu_table.split(".otu_table")[0]
else:
base = args.out
#remove logfile if exists
log_name = base + '.amptk-filter.log'
amptklib.removefile(log_name)
amptklib.setupLogging(log_name)
FNULL = open(os.devnull, 'w')
cmd_args = " ".join(sys.argv) + '\n'
amptklib.log.debug(cmd_args)
print("-------------------------------------------------------")
#initialize script, log system info and usearch version
amptklib.SystemInfo()
#Do a version check
usearch = args.usearch
amptklib.versionDependencyChecks(usearch)
#check if otu_table is empty
amptklib.log.info("Loading OTU table: %s" % args.otu_table)
check = os.stat(args.otu_table).st_size
if check == 0:
amptklib.log.error("Input OTU table is empty")
sys.exit(1)
#get the OTU header info (depending on how OTU table was constructed, this might be different, so find it as you need for indexing)
with open(args.otu_table, 'r') as f:
first_line = f.readline()
OTUhead = first_line.split('\t')[0]
if args.delimiter == 'csv':
delim = str(',')
ending = '.csv'
elif args.delimiter == 'tsv':
delim = str('\t')
ending = '.txt'
#setup outputs
sorted_table = base + '.sorted' + ending
normal_table_pct = base + '.normalized.pct' + ending
normal_table_nums = base + '.normalized.num' + ending
subtract_table = base + '.normalized.subtract' + ending
filtered_table = base + '.normalized' + ending
final_table = base + '.final' + ending
final_binary_table = base + '.final.binary' + ending
stats_table = base + '.stats' + ending
#load OTU table into pandas DataFrame
df = pd.read_csv(args.otu_table, sep='\t')
df.set_index(OTUhead, inplace=True)
headers = df.columns.values.tolist()
if headers[-1] == 'taxonomy' or headers[-1] == 'Taxonomy':
otuDict = df[headers[-1]].to_dict()
del df[headers[-1]]
else:
otuDict = False
#parse OTU table to get count data for each OTU
AddCounts = {}
OTUcounts = df.sum(1)
for x in OTUcounts.index:
AddCounts[x] = int(OTUcounts[x])
#now add counts to fasta header
FastaCounts = base + '.otus.counts.fa'
OTU_tax = {}
with open(FastaCounts, 'w') as outfile:
with open(args.fasta, 'r') as infile:
for rec in SeqIO.parse(infile, 'fasta'):
if ';' in rec.id: #this should mean there is taxonomy, so split it
ID = rec.id.split(';', 1)[0]
tax = rec.id.split(';', 1)[-1]
OTU_tax[ID] = tax
if ID in AddCounts:
count = AddCounts.get(ID)
else:
count = 0
outfile.write('>%s;size=%i\n%s\n' % (ID, count, rec.seq))
else: #no tax, just process
if rec.id in AddCounts:
count = AddCounts.get(rec.id)
else:
count = 0
outfile.write('>%s;size=%i\n%s\n' %
(rec.id, count, rec.seq))
amptklib.log.info(
'OTU table contains {:,} samples, {:,} OTUs, and {:,} reads counts'.
format(len(df.columns.values.tolist()), len(df.index),
int(df.values.sum())))
#setup output files/variables
mock_out = base + '.mockmap.txt'
if args.mock_barcode: #if user passes a column name for mock
#check if mock barcode is valid
validBCs = df.columns.values.tolist()
if not args.mock_barcode in validBCs:
amptklib.log.error("%s not a valid barcode." % args.mock_barcode)
amptklib.log.error("Valid barcodes: %s" % (' '.join(validBCs)))
sys.exit(1)
if args.col_order and not args.mock_barcode in args.col_order:
amptklib.log.error("Error: %s not listed in --col_order." %
args.mock_barcode)
sys.exit(1)
#make sure there is a --mc passed here otherwise throw error
if not args.mc:
amptklib.log.error(
"If using the -b,--barcode option you must specify a fasta file of mock community via the --mc option"
)
sys.exit(1)
#get default mock community value
if args.mc == "mock3":
mock = os.path.join(parentdir, 'DB', 'amptk_mock3.fa')
elif args.mc == "mock2":
mock = os.path.join(parentdir, 'DB', 'amptk_mock2.fa')
elif args.mc == "mock1":
mock = os.path.join(parentdir, 'DB', 'amptk_mock1.fa')
elif args.mc == "synmock":
mock = os.path.join(parentdir, 'DB', 'amptk_synmock.fa')
else:
mock = os.path.abspath(args.mc)
#open mock community fasta and count records
mock_ref_count = amptklib.countfasta(mock)
#load OTU lengths into dictionary
SeqLength = amptklib.fastalen2dict(args.fasta)
#map OTUs to mock community, this is fast enough, but running twice, first to get only top hit, then
amptklib.log.info("Mapping OTUs to Mock Community (USEARCH)")
cmd = [
usearch, '-usearch_global', mock, '-strand', 'plus', '-id', '0.65',
'-db', FastaCounts, '-userout', mock_out, '-userfields',
'query+target+id+ql+tl+alnlen+caln+mism+diffs', '-maxaccepts', '0',
'-maxrejects', '0'
]
amptklib.runSubprocess(cmd, amptklib.log)
#generate dictionary for name change
'''
If args.calculate is set to all, that means the script is trying to measure a synthetic
mock of some kind. if that is the case, then chimeras are < 95% identical to mock members
and variants would be hits in between, i.e 95% > but not the best hit.
'''
Results = {}
errorrate = {}
with open(mock_out, 'r') as map:
for line in map:
line = line.replace('\n', '')
cols = line.split('\t')
MockID = cols[0]
hit = cols[1].split(';size=')
otuID = hit[0]
abundance = int(hit[1])
pident = float(cols[2])
length = int(cols[4])
mism = int(cols[7])
diffs = int(cols[8])
score = abundance * pident * length
if not otuID in errorrate:
errorrate[otuID] = [MockID, diffs]
else:
olderror = errorrate.get(otuID)
if diffs < olderror[1]:
errorrate[otuID] = [MockID, diffs]
if not MockID in Results:
Results[MockID] = [(otuID, abundance, pident, length, mism,
diffs, score)]
else:
Results[MockID].append(
(otuID, abundance, pident, length, mism, diffs, score))
found_dict = {}
chimeras = []
variants = []
missing = []
for k, v in natsorted(list(Results.items())):
besthit = []
#v is a list of tuples of results, parse through to get best hit
for y in v:
if y[2] >= 97.0:
besthit.append(y)
elif y[2] >= 95.0 and y[2] < 97.0:
if not y[0] in variants:
variants.append(y[0])
else:
if not y[0] in chimeras:
chimeras.append(y[0])
if len(besthit) > 0:
besthit.sort(key=lambda x: x[1], reverse=True)
best = sorted(besthit[:3], key=lambda x: x[6], reverse=True)
found_dict[k] = best[0]
else:
missing.append(k)
#make name change dict
annotate_dict = {}
seen = []
for k, v in natsorted(list(found_dict.items())):
ID = v[0].replace('_chimera', '')
newID = k + '_pident=' + str(v[2]) + '_' + v[0]
annotate_dict[ID] = newID
if not v[0] in seen:
seen.append(v[0])
if args.calculate == 'all':
chimeras = [x for x in chimeras if x not in seen]
variants = [x for x in variants if x not in seen]
for i in chimeras:
annotate_dict[i] = i + '_suspect_mock_chimera'
for x in variants:
annotate_dict[x] = x + '_suspect_mock_variant'
if len(missing) > 0:
amptklib.log.info("%i mock missing: %s" %
(len(missing), ', '.join(missing)))
else:
otu_new = args.fasta
#rename OTUs
if args.mock_barcode:
df.rename(index=annotate_dict, inplace=True)
#sort the table
df2 = df.reindex(index=natsorted(df.index))
if not args.col_order:
amptklib.log.info("Sorting OTU table naturally")
df = df2.reindex(columns=natsorted(df2.columns))
else:
amptklib.log.info(
"Sorting OTU table by user defined order (--col_order)")
col_headers = args.col_order
#check if all names in headers or not
for i in col_headers:
if not i in df2.columns.values:
col_headers.remove(i)
df = df2.reindex(columns=col_headers)
SortedTable = df
if otuDict:
df['Taxonomy'] = pd.Series(otuDict)
df.to_csv(sorted_table, sep=delim)
del df['Taxonomy']
else:
df.to_csv(sorted_table, sep=delim)
#get sums of columns
fs = df.sum(axis=0)
#fs.to_csv('reads.per.sample.csv')
otus_per_sample_original = df[df > 0].count(axis=0, numeric_only=True)
filtered = pd.DataFrame(df, columns=fs.index)
filt2 = filtered.loc[(filtered != 0).any(1)]
tos = filt2.sum(axis=1)
fotus = tos[
tos >= args.
min_reads_otu] #valid allele must be found atleast from than 2 times, i.e. no singletons
if len(fotus.index) < len(tos.index):
diff = len(tos.index) - len(fotus.index)
amptklib.log.info(
"Removing {:,} OTUs according to --min_reads_otu {:,}".format(
diff, args.min_reads_otu))
filt3 = pd.DataFrame(filt2, index=fotus.index)
if args.normalize == 'y':
#normalize the OTU table
normal = filt3.truediv(fs)
if otuDict:
normal['Taxonomy'] = pd.Series(otuDict)
normal.to_csv(normal_table_pct, sep=delim)
del normal['Taxonomy']
else:
normal.to_csv(normal_table_pct, sep=delim)
#normalize back to read counts, pretend 100,000 reads in each
norm_round = np.round(normal.multiply(100000), decimals=0)
if otuDict:
norm_round['Taxonomy'] = pd.Series(otuDict)
norm_round.to_csv(normal_table_nums, sep=delim)
del norm_round['Taxonomy']
else:
norm_round.to_csv(normal_table_nums, sep=delim)
amptklib.log.info(
"Normalizing OTU table to number of reads per sample")
else:
norm_round = filt3
if args.mock_barcode:
#now calculate the index-bleed in both directions (into the mock and mock into the other samples)
mock = []
sample = []
#get names from mapping
for k, v in list(annotate_dict.items()):
if not '_suspect_mock_' in v:
mock.append(v)
for i in norm_round.index:
if not i in mock:
sample.append(i)
if args.ignore:
mock = [x for x in mock if x not in args.ignore]
sample = [x for x in sample if x not in args.ignore]
#first calculate bleed out of mock community
#slice normalized dataframe to get only mock OTUs from table
mock_df = pd.DataFrame(norm_round, index=mock)
#if there are samples to drop, make sure they aren't being used in this calculation
if args.drop:
mock_df.drop(args.drop, axis=1, inplace=True)
#get total number of reads from mock OTUs from entire table
total = np.sum(np.sum(mock_df, axis=None))
#now drop the mock barcode sample
mock_df.drop(args.mock_barcode, axis=1, inplace=True)
#get number of reads that are result of bleed over
bleed1 = np.sum(np.sum(mock_df, axis=None))
#calculate rate of bleed by taking num reads bleed divided by the total
bleed1max = bleed1 / float(total)
#second, calculate bleed into mock community
#get list of mock OTUs not found in any other sample -> these are likely chimeras
mock_only = pd.DataFrame(norm_round,
index=list(norm_round.index),
columns=[args.mock_barcode])
mock_OTUs_zeros = mock_only.loc[(mock_only == 0).all(axis=1)]
theRest = [
x for x in list(norm_round.columns.values)
if x not in [args.mock_barcode]
]
non_mocks = pd.DataFrame(norm_round, index=sample, columns=theRest)
non_mock_zeros = non_mocks.loc[(non_mocks == 0).all(axis=1)]
zeros = [
x for x in list(non_mock_zeros.index)
if x not in list(mock_OTUs_zeros.index)
]
if len(zeros) > 0:
amptklib.log.info(
"Found {:,} mock chimeras (only in mock sample and not mapped to mock sequences) excluding from index-bleed calculation"
.format(len(zeros)))
amptklib.log.debug('{:}'.format(', '.join(zeros)))
#now get updated list of samples, dropping chimeras
samples_trimmed = [x for x in sample if x not in zeros]
#slice the OTU table to get all OTUs that are not in mock community from the mock sample
sample_df = pd.DataFrame(norm_round,
index=samples_trimmed,
columns=[args.mock_barcode])
#get total number of reads that don't belong in mock
bleed2 = np.sum(np.sum(sample_df, axis=None))
#now pull the entire mock sample
mock_sample = pd.DataFrame(norm_round, columns=[args.mock_barcode])
#calcuate bleed into mock by taking num reads that don't belong divided by the total, so this is x% of bad reads in the mock
bleed2max = bleed2 / float(np.sum(mock_sample.sum(axis=1)))
#autocalculate the subtraction filter by taking the maximum value that doesn't belong
subtract_num = max(sample_df.max())
#get max values for bleed
#can only use into samples measurement if not using synmock
if args.calculate == 'all':
if bleed1max > bleed2max:
bleedfilter = math.ceil(bleed1max * 1000) / 1000
else:
bleedfilter = math.ceil(bleed2max * 1000) / 1000
amptklib.log.info(
"Index bleed, mock into samples: %f%%. Index bleed, samples into mock: %f%%."
% (bleed1max * 100, bleed2max * 100))
else:
bleedfilter = math.ceil(bleed2max * 1000) / 1000
amptklib.log.info("Index bleed, samples into mock: %f%%." %
(bleed2max * 100))
else:
bleedfilter = args.index_bleed #this is value needed to filter MiSeq, Ion is likely less, but shouldn't effect the data very much either way.
if args.index_bleed:
args.index_bleed = float(args.index_bleed)
amptklib.log.info(
"Overwriting auto detect index-bleed, setting to %f%%" %
(args.index_bleed * 100))
bleedfilter = args.index_bleed
else:
if bleedfilter:
amptklib.log.info(
"Will use value of %f%% for index-bleed OTU filtering." %
(bleedfilter * 100))
else:
bleedfilter = 0 #no filtering if you don't pass -p or -b
amptklib.log.info(
"No spike-in mock (-b) or index-bleed (-p) specified, thus not running index-bleed filtering"
)
if bleedfilter > 0.05:
amptklib.log.info(
"Index bleed into samples is abnormally high (%f%%), if you have biological mock you should use `--calculate in`"
% (bleedfilter * 100))
#to combat barcode switching, loop through each OTU filtering out if less than bleedfilter threshold
cleaned = []
for row in norm_round.itertuples():
result = [row[0]]
if args.threshold == 'max':
total = max(
row[1:]
) #get max OTU count from table to calculate index bleed from.
elif args.threshold == 'sum':
total = sum(row[1:])
elif args.threshold == 'top25':
top = sorted(row[1:], key=int, reverse=True)
topn = int(round(len(row[1:]) * 0.25))
total = sum(top[:topn])
elif args.threshold == 'top10':
top = sorted(row[1:], key=int, reverse=True)
topn = int(round(len(row[1:]) * 0.10))
total = sum(top[:topn])
elif args.threshold == 'top5':
top = sorted(row[1:], key=int, reverse=True)
topn = int(round(len(row[1:]) * 0.05))
total = sum(top[:topn])
sub = total * bleedfilter
for i in row[1:]:
if i < sub:
i = 0
result.append(i)
cleaned.append(result)
header = [OTUhead]
for i in norm_round.columns:
header.append(i)
#create data frame of index bleed filtered results
final = pd.DataFrame(cleaned, columns=header)
final.set_index(OTUhead, inplace=True)
if args.drop: #if user has passed samples to drop, do it here, subtract drop list from Header
amptklib.log.info("Dropping %i samples from table: %s" %
(len(args.drop), ', '.join(args.drop)))
colsdrop = []
for x in args.drop:
if x in header:
colsdrop.append(x)
#now drop those columns
final.drop(colsdrop, axis=1, inplace=True)
if args.subtract != 'auto':
subtract_num = int(args.subtract)
else:
try:
subtract_num = int(subtract_num)
amptklib.log.info("Auto subtract filter set to %i" % subtract_num)
except NameError:
subtract_num = 0
amptklib.log.info(
"Error: to use 'auto' subtract feature, provide a sample name to -b,--mock_barcode."
)
if subtract_num != 0:
amptklib.log.info("Subtracting %i from OTU table" % subtract_num)
sub = final.subtract(subtract_num)
sub[sub < 0] = 0 #if negative, change to zero
sub = sub.loc[~(sub == 0).all(axis=1)]
sub = sub.astype(int)
if otuDict:
sub['Taxonomy'] = pd.Series(otuDict)
sub.to_csv(subtract_table, sep=delim)
del sub['Taxonomy']
else:
sub.to_csv(subtract_table, sep=delim)
otus_if_sub = sub[sub > 0].count(axis=0, numeric_only=True)
final = sub.astype(int)
otus_per_sample = final[final > 0].count(axis=0, numeric_only=True)
stats = pd.concat([fs, otus_per_sample_original, otus_per_sample], axis=1)
stats.columns = ['reads per sample', 'original OTUs', 'final OTUs']
stats.fillna(0, inplace=True)
stats = stats.astype(int)
if args.show_stats:
print(stats.to_string())
stats.to_csv(stats_table, sep=delim)
#after all filtering, get list of OTUs in mock barcode
if args.mock_barcode:
mocks = final[args.mock_barcode]
mocks = mocks.loc[~(mocks == 0)].astype(int)
totalmismatches = 0
totallength = 0
chimera_count = 0
variant_count = 0
for otu in mocks.index:
count = mocks[otu]
if 'suspect_mock' in otu:
if 'chimera' in otu:
chimera_count += 1
if 'variant' in otu:
variant_count += 1
otu = otu.split('_', 1)[0]
else:
otu = otu.split('_', -1)[-1]
otu_length = SeqLength.get(otu)
countlen = otu_length * count
totallength += countlen
if otu in errorrate:
otu_diffs = errorrate.get(otu)[1]
totaldiffs = otu_diffs * count
totalmismatches += totaldiffs
else:
totalmismatches += countlen
e_rate = totalmismatches / float(totallength) * 100
amptklib.log.info(args.mock_barcode + ' sample has ' +
'{0:,}'.format(len(mocks)) + ' OTUS out of ' +
'{0:,}'.format(mock_ref_count) + ' expected; ' +
'{0:,}'.format(variant_count) + ' mock variants; ' +
'{0:,}'.format(chimera_count) +
' mock chimeras; Error rate: ' +
'{0:.3f}%'.format(e_rate))
if not args.keep_mock:
try:
final.drop(args.mock_barcode, axis=1, inplace=True)
except:
pass
#drop OTUs that are now zeros through whole table
final = final.loc[~(final == 0).all(axis=1)]
final = final.astype(int)
#output filtered normalized table
if otuDict:
final['Taxonomy'] = pd.Series(otuDict)
final.to_csv(filtered_table, sep=delim)
del final['Taxonomy']
else:
final.to_csv(filtered_table, sep=delim)
#convert to binary
final[final > 0] = 1
#apply min_sample_otu here (most stringent filter, not sure I would use this unless you know what you are doing)
los = final.sum(axis=1)
fotus = los[los >= args.min_samples_otu]
keep = fotus.index
final2 = pd.DataFrame(final, index=keep)
diff = len(final.index) - len(keep)
if diff > 0:
amptklib.log.info(
'Dropped {:,} OTUs found in fewer than {:,} samples'.format(
diff, args.min_samples_otu))
#drop samples that don't have any OTUs after filtering
final3 = final2.loc[:, (final2 != 0).any(axis=0)]
final3 = final3.astype(int)
#get the actual read counts from binary table
merge = {}
for index, row in final3.items():
merge[index] = []
for i in range(0, len(row)):
if row[i] == 0:
merge[index].append(row[i])
else:
merge[index].append(SortedTable[index][row.index[i]])
FiltTable = pd.DataFrame(merge, index=list(final3.index))
FiltTable.index.name = '#OTU ID'
#order the filtered table
#sort the table
FiltTable2 = FiltTable.reindex(index=natsorted(FiltTable.index))
if not args.col_order:
FiltTable = FiltTable2.reindex(columns=natsorted(FiltTable2.columns))
else:
col_headers = args.col_order
#check if all names in headers or not
for i in col_headers:
if not i in FiltTable2.columns.values:
col_headers.remove(i)
FiltTable = FiltTable2.reindex(columns=col_headers)
#check for negative samples and how many OTUs are in these samples
#if found, filter the OTUs and alert user to rebuild OTU table, I could do this automatically, but would then require
#there to be reads passed to this script which seems stupid. Just deleting the OTUs is probably not okay....
if args.negatives:
if len(args.negatives
) > 1: #if greater than 1 then assuming list of sample names
Neg = args.negatives
else:
if os.path.isfile(
args.negatives[0]): #check if it is a file or not
Neg = []
with open(args.negatives[0], 'r') as negfile:
for line in negfile:
line = line.replace('\n', '')
Neg.append(line)
else:
Neg = args.negatives
#Now slice the final OTU table, check if values are valid
NotFound = []
for i in Neg:
if not i in FiltTable.columns.values:
Neg.remove(i)
NotFound.append(i)
if len(NotFound) > 0:
amptklib.log.info('Samples not found: %s' % ' '.join(NotFound))
#slice table
NegTable = FiltTable.reindex(columns=Neg)
#drop those that are zeros through all samples, just pull out OTUs found in the negative samples
NegTable = NegTable.loc[~(NegTable == 0).all(axis=1)]
NegOTUs = list(NegTable.index)
#now make sure you aren't dropping mock OTUs as you want to keep those for filtering new OTU table
NegOTUs = [item for item in NegOTUs if item not in mock]
else:
NegOTUs = []
#check if negative OTUs exist, if so, then output updated OTUs and instructions on creating new OTU table
if len(NegOTUs) > 0:
amptklib.log.info("%i OTUs are potentially contamination" %
len(NegOTUs))
otu_clean = base + '.cleaned.otus.fa'
with open(otu_clean, 'w') as otu_update:
with open(args.fasta, "rU") as myfasta:
for rec in SeqIO.parse(myfasta, 'fasta'):
if not rec.id in NegOTUs:
SeqIO.write(rec, otu_update, 'fasta')
amptklib.log.info("Cleaned OTUs saved to: %s" % otu_clean)
amptklib.log.info(
"Generate a new OTU table like so:\namptk remove -i %s --format fasta -l %s -o %s\nvsearch --usearch_global %s --db %s --strand plus --id 0.97 --otutabout newOTU.table.txt\n"
% (base + '.demux.fq', ' '.join(Neg), base + '.cleaned.fa',
base + '.cleaned.fa', otu_clean))
else: #proceed with rest of script
#output final table
if otuDict:
FiltTable['Taxonomy'] = pd.Series(otuDict)
FiltTable.to_csv(final_table, sep=delim)
del FiltTable['Taxonomy']
else:
FiltTable.to_csv(final_table, sep=delim)
finalSamples = FiltTable.columns.values.tolist()
if 'Taxonomy' in finalSamples:
numFinalSamples = len(finalSamples) - 1
else:
numFinalSamples = len(finalSamples)
amptklib.log.info(
'Filtered OTU table contains {:,} samples, {:,} OTUs, and {:,} read counts'
.format(numFinalSamples, len(FiltTable.index),
FiltTable.values.sum()))
if numFinalSamples < len(df.columns.values.tolist()):
diffSamples = [
item for item in headers
if item not in FiltTable.columns.values.tolist()
]
amptklib.log.info('Samples dropped: %s' % (','.join(diffSamples)))
#output binary table
if otuDict:
final3['Taxonomy'] = pd.Series(otuDict)
final3.to_csv(final_binary_table, sep=delim)
else:
final3.to_csv(final_binary_table, sep=delim)
#generate final OTU list for taxonomy
amptklib.log.info("Finding valid OTUs")
otu_new = base + '.filtered.otus.fa'
with open(otu_new, 'w') as otu_update:
with open(args.fasta, "rU") as myfasta:
for rec in SeqIO.parse(myfasta, 'fasta'):
if ';' in rec.id:
rec.id = rec.id.split(';', 1)[0]
if args.mock_barcode:
#map new names of mock
if rec.id in annotate_dict:
newname = annotate_dict.get(rec.id)
rec.id = newname
rec.description = ''
if rec.id in final3.index:
if rec.id in OTU_tax:
otu_update.write(
'>%s;%s\n%s\n' %
(rec.id, OTU_tax.get(rec.id), rec.seq))
else:
otu_update.write('>%s\n%s\n' % (rec.id, rec.seq))
#tell user what output files are
print("-------------------------------------------------------")
print("OTU Table filtering finished")
print("-------------------------------------------------------")
print("OTU Table Stats: %s" % stats_table)
print("Sorted OTU table: %s" % sorted_table)
if not args.debug:
for i in [
normal_table_pct, normal_table_nums, subtract_table,
mock_out, FastaCounts
]:
amptklib.removefile(i)
else:
print("Normalized (pct): %s" % normal_table_pct)
print("Normalized (10k): %s" % normal_table_nums)
if args.subtract != 0:
print("Subtracted table: %s" % subtract_table)
print("Normalized/filter: %s" % filtered_table)
print("Final Binary table: %s" % final_binary_table)
print("Final OTU table: %s" % final_table)
print("Filtered OTUs: %s" % otu_new)
print("-------------------------------------------------------")
if 'darwin' in sys.platform:
print(colr.WARN + "\nExample of next cmd:" + colr.END +
" amptk taxonomy -f %s -i %s -m mapping_file.txt -d ITS2\n" %
(otu_new, final_table))
else:
print(
"\nExample of next cmd: amptk taxonomy -f %s -i %s -m mapping_file.txt -d ITS2\n"
% (otu_new, final_table))
def main(args):
parser = argparse.ArgumentParser(
prog='amptk-OTU_cluster_ref.py',
usage="%(prog)s [options] -i file.demux.fq\n%(prog)s -h for help menu",
description='''Script runs UPARSE OTU clustering.
Requires USEARCH by Robert C. Edgar: http://drive5.com/usearch''',
epilog="""Written by Jon Palmer (2016) [email protected]""",
formatter_class=MyFormatter)
parser.add_argument('-i',
'--fastq',
dest="FASTQ",
required=True,
help='FASTQ file (Required)')
parser.add_argument('-o', '--out', help='Base output name')
parser.add_argument('-e',
'--maxee',
default='1.0',
help='Quality trim EE value')
parser.add_argument('-p',
'--pct_otu',
default='97',
help="OTU Clustering Percent")
parser.add_argument('--id', default='97', help="Threshold for alignment")
parser.add_argument('-m',
'--minsize',
default='2',
help='Min identical seqs to process')
parser.add_argument('-u',
'--usearch',
dest="usearch",
default='usearch9',
help='USEARCH9 EXE')
parser.add_argument('--map_filtered',
action='store_true',
help='map quality filtered reads back to OTUs')
parser.add_argument(
'-d',
'--db',
required=True,
help='Reference Database [ITS,ITS1,ITS2,16S,LSU,COI,custom]')
parser.add_argument('--utax_db', help='UTAX Reference Database')
parser.add_argument('--utax_cutoff',
default=0.8,
type=restricted_float,
help='UTAX confidence value threshold.')
parser.add_argument('--utax_level',
default='k',
choices=['k', 'p', 'c', 'o', 'f', 'g', 's'],
help='UTAX classification level to retain')
parser.add_argument('--mock',
default='synmock',
help='Spike-in mock community (fasta)')
parser.add_argument('--debug',
action='store_true',
help='Remove Intermediate Files')
parser.add_argument('--closed_ref_only',
action='store_true',
help='Only run closed reference clustering')
parser.add_argument('--cpus',
type=int,
help="Number of CPUs. Default: auto")
args = parser.parse_args(args)
parentdir = os.path.join(os.path.dirname(amptklib.__file__))
#get basename if not args.out passed
if args.out:
base = args.out
else:
if 'demux' in args.FASTQ:
base = os.path.basename(args.FASTQ).split('.demux')[0]
else:
base = os.path.basename(args.FASTQ).split('.f')[0]
taxonomyLookup = {
'k': 'Kingdom',
'p': 'Phylum',
'c': 'Class',
'o': 'Order',
'f': 'Family',
'g': 'Genus',
's': 'Species'
}
#remove logfile if exists
log_name = base + '.amptk-cluster_ref.log'
if os.path.isfile(log_name):
os.remove(log_name)
amptklib.setupLogging(log_name)
FNULL = open(os.devnull, 'w')
cmd_args = " ".join(sys.argv) + '\n'
amptklib.log.debug(cmd_args)
print("-------------------------------------------------------")
#initialize script, log system info and usearch version
amptklib.SystemInfo()
#Do a version check
usearch = args.usearch
amptklib.versionDependencyChecks(usearch)
#get number of cpus
if args.cpus:
cpus = args.cpus
else:
cpus = amptklib.getCPUS()
#make tmp folder
tmp = base + '_tmp'
if not os.path.exists(tmp):
os.makedirs(tmp)
#Setup DB locations and names, etc
DBdir = os.path.join(parentdir, 'DB')
DataBase = {
'ITS1':
(os.path.join(DBdir, 'ITS.udb'), os.path.join(DBdir, 'ITS1_UTAX.udb')),
'ITS2':
(os.path.join(DBdir, 'ITS.udb'), os.path.join(DBdir, 'ITS2_UTAX.udb')),
'ITS': (os.path.join(DBdir,
'ITS.udb'), os.path.join(DBdir, 'ITS_UTAX.udb')),
'16S': (os.path.join(DBdir, '16S.udb'), os.path.join(DBdir,
'16S.udb')),
'LSU': (os.path.join(DBdir,
'LSU.udb'), os.path.join(DBdir, 'LSU_UTAX.udb')),
'COI': (os.path.join(DBdir,
'COI.udb'), os.path.join(DBdir, 'COI_UTAX.udb'))
}
#setup refDB
amptklib.log.info("Checking Reference Database")
if args.db in DataBase:
#need to write to fasta from vsearch UDB
DB = os.path.join(tmp, args.db + '.extracted.fa')
cmd = [
'vsearch', '--udb2fasta',
DataBase.get(args.db)[0], '--output', DB
]
amptklib.runSubprocess(cmd, amptklib.log)
else:
DB = os.path.abspath(args.db)
refDB = os.path.join(tmp, 'reference_DB.fa')
if args.mock:
if args.mock == 'synmock':
mock = os.path.join(parentdir, 'DB', 'amptk_synmock.fa')
else:
mock = os.path.abspath(args.mock)
seen = []
with open(refDB, 'w') as output:
if args.mock:
with open(mock) as input1:
for rec in SeqIO.parse(input1, 'fasta'):
if not rec.id in seen:
SeqIO.write(rec, output, 'fasta')
else:
amptklib.log.error(
"Duplicate ID's in Ref DB: %s, exiting" % rec.id)
sys.exit(1)
with open(DB) as input2:
for rec in SeqIO.parse(input2, 'fasta'):
if not rec.id in seen:
SeqIO.write(rec, output, 'fasta')
else:
amptklib.log.error(
"Duplicate ID's in Ref DB: %s, exiting" % rec.id)
sys.exit(1)
#get utax_database
if args.db in DataBase:
utaxDB = DataBase.get(args.db)[1]
else:
if not args.closed_ref_only:
if args.utax_db:
utaxDB = os.path.abspath(args.utax_db)
else:
amptklib.log.error(
"%s not pre-installed DB, must then also specify valid UTAX database via --utax_db"
% args.db)
sys.exit(1)
#Count FASTQ records
amptklib.log.info("Loading FASTQ Records")
#convert to FASTA for mapping
orig_fasta = os.path.join(tmp, base + '.orig.fa')
cmd = [
'vsearch', '--fastq_filter', args.FASTQ, '--fastaout', orig_fasta,
'--fastq_qmax', '55', '--threads',
str(cpus)
]
amptklib.runSubprocess(cmd, amptklib.log)
orig_total = amptklib.countfasta(orig_fasta)
size = amptklib.checkfastqsize(args.FASTQ)
readablesize = amptklib.convertSize(size)
amptklib.log.info('{0:,}'.format(orig_total) + ' reads (' + readablesize +
')')
#Expected Errors filtering step
filter_out = os.path.join(tmp, base + '.EE' + args.maxee + '.filter.fq')
filter_fasta = os.path.join(tmp, base + '.EE' + args.maxee + '.filter.fa')
amptklib.log.info("Quality Filtering, expected errors < %s" % args.maxee)
cmd = [
'vsearch', '--fastq_filter', args.FASTQ, '--fastq_maxee',
str(args.maxee), '--fastqout', filter_out, '--fastaout', filter_fasta,
'--fastq_qmax', '55', '--threads',
str(cpus)
]
amptklib.runSubprocess(cmd, amptklib.log)
qtrimtotal = amptklib.countfastq(filter_out)
amptklib.log.info('{0:,}'.format(qtrimtotal) + ' reads passed')
#now run full length dereplication
derep_out = os.path.join(tmp, base + '.EE' + args.maxee + '.derep.fa')
amptklib.log.info("De-replication (remove duplicate reads)")
cmd = [
'vsearch', '--derep_fulllength', filter_fasta, '--sizeout', '--output',
derep_out, '--threads',
str(cpus), '--threads',
str(cpus)
]
amptklib.runSubprocess(cmd, amptklib.log)
total = amptklib.countfasta(derep_out)
amptklib.log.info('{0:,}'.format(total) + ' reads passed')
#now run sort by size
sort_out = os.path.join(tmp, base + '.EE' + args.maxee + '.sort.fa')
amptklib.log.info(
"Sorting reads by size: removing reads seen less than %s times" %
args.minsize)
cmd = [
'vsearch', '--sortbysize', derep_out, '--minsize', args.minsize,
'--output', sort_out, '--threads',
str(cpus)
]
amptklib.runSubprocess(cmd, amptklib.log)
total = amptklib.countfasta(sort_out)
amptklib.log.info('{0:,}'.format(total) + ' reads passed')
#chimera detection
#first run through de novo chimera detection
amptklib.log.info("De novo chimera detection (VSEARCH)")
chimera_out = os.path.join(tmp,
base + '.EE' + args.maxee + '.chimera_check.fa')
cmd = [
'vsearch', '--uchime_denovo', sort_out, '--relabel', 'Seq',
'--sizeout', '--nonchimeras', chimera_out, '--threads',
str(cpus)
]
amptklib.runSubprocess(cmd, amptklib.log)
total = amptklib.countfasta(chimera_out)
amptklib.log.info('{0:,}'.format(total) + ' reads passed')
#now run uchime_ref
uchime_out = os.path.join(tmp,
base + '.EE' + args.maxee + '.uchime.otus.fa')
#now run chimera filtering if all checks out
amptklib.log.info("Chimera Filtering (VSEARCH)")
cmd = [
'vsearch', '--mindiv', '1.0', '--uchime_ref', chimera_out, '--db',
refDB, '--sizeout', '--nonchimeras', uchime_out, '--threads',
str(cpus)
]
amptklib.runSubprocess(cmd, amptklib.log)
total = amptklib.countfasta(uchime_out)
amptklib.log.info('{0:,}'.format(total) + ' OTUs passed')
#now run usearch_global versus reference database
align_out = os.path.join(tmp, base + '.align.uc')
pident = int(args.id) * 0.01
amptklib.log.info(
"Reference Clustering using Global Alignment, %s%% identity" % args.id)
cmd = [
'vsearch', '--usearch_global', uchime_out, '--db', refDB, '--id',
str(pident), '--output_no_hits', '--top_hits_only', '--notrunclabels',
'--uc', align_out, '--threads',
str(cpus)
]
amptklib.runSubprocess(cmd, amptklib.log)
#parse results
ref_results = {}
nohits = []
with open(align_out, 'r') as alignment:
for line in alignment:
line = line.replace('\n', '')
col = line.split('\t')
counts = col[8].split(';')
counts = int(counts[1].replace('size=', ''))
if col[3] == '*':
nohits.append(col[8])
continue
if float(col[3]) >= float(args.id):
if not col[8] in ref_results:
ref_results[col[8]] = (col[9], col[3], counts)
else:
print("Error: %s duplicated ID" % col[8])
else:
nohits.append(col[8])
#summarize results from first ref clustering
num_refcluster = len(ref_results)
seqs_refcluster = 0
for k, v in list(ref_results.items()):
seqs_refcluster += v[2]
amptklib.log.info("%i OTUs classified " % num_refcluster +
"({0:.0f}%".format(seqs_refcluster / float(qtrimtotal) *
100) + " of reads)")
#get ref clustered hits to file with taxonomy
ref_clustered = os.path.join(tmp, base + '.ref_clustered.fa')
with open(ref_clustered, 'w') as refoutput:
with open(uchime_out, 'r') as input:
otu_counter = 1
for rec in SeqIO.parse(input, 'fasta'):
if rec.id in ref_results:
res = ref_results.get(rec.id)
pident = res[1]
tax = res[0]
newID = 'OTU' + str(
otu_counter) + ';pident=' + pident + ';' + tax
rec.id = newID
rec.name = ''
rec.description = ''
SeqIO.write(rec, refoutput, 'fasta')
otu_counter += 1
if not args.closed_ref_only:
#get nohits file to run clustering
utax_ref = os.path.join(tmp,
base + '.EE' + args.maxee + '.utax_ref.fa')
with open(utax_ref, 'w') as output:
with open(uchime_out, 'r') as input:
for rec in SeqIO.parse(input, 'fasta'):
if rec.id in nohits:
SeqIO.write(rec, output, 'fasta')
#input needs to be sorted, so
ref_sort = os.path.join(tmp, base + '.utax_ref.sorted.fa')
cmd = [
'vsearch', '--sortbysize', utax_ref, '--minsize', args.minsize,
'--output', ref_sort, '--threads',
str(cpus)
]
amptklib.runSubprocess(cmd, amptklib.log)
#now run clustering algorithm on those not found in reference database
radius = str(100 - int(args.pct_otu))
otu_out = os.path.join(tmp, base + '.EE' + args.maxee + '.otus.fa')
amptklib.log.info("De novo Clustering remaining sequences (UPARSE)")
cmd = [
usearch, '-cluster_otus', ref_sort, '-relabel', 'OTU',
'-otu_radius_pct', radius, '-otus', otu_out
]
amptklib.runSubprocess(cmd, amptklib.log)
total = amptklib.countfasta(otu_out)
amptklib.log.info('{0:,}'.format(total) + ' de novo OTUs')
#try utax reference clustering
amptklib.log.info("Reference Clustering de novo OTUs using UTAX")
cmd = [
usearch, '-cluster_otus_utax', otu_out, '-db', utaxDB,
'-utax_cutoff',
str(args.utax_cutoff), '-utax_level', 's', '-strand', 'plus',
'-utaxout',
os.path.join(tmp, base + '.utax.out')
]
amptklib.runSubprocess(cmd, amptklib.log)
#setup tax filtering
tax_values = ['k', 'p', 'c', 'o', 'f', 'g', 's']
filter_index = tax_values.index(args.utax_level)
filt_tax_values = [s + ':' for s in tax_values[filter_index:]]
#get results from utax
with open(ref_clustered, 'a') as output:
seqDict = SeqIO.index(otu_out, 'fasta')
utaxresults = []
with open(os.path.join(tmp, base + '.utax.out'), 'r') as utax:
for line in utax:
line = line.replace('\n', '')
col = line.split('\t')
ID = col[0]
tax = col[2]
if any(x in tax for x in filt_tax_values):
record = seqDict[ID]
record.id = 'OTU' + str(
otu_counter) + ';UTAX;tax=' + tax
record.name = ''
record.description = ''
SeqIO.write(record, output, 'fasta')
otu_counter += 1
total = amptklib.countfasta(ref_clustered) - num_refcluster
amptklib.log.info('{0:,}'.format(total) + ' classified to %s' %
taxonomyLookup.get(args.utax_level))
#clean up padded N's
amptklib.log.info("Cleaning up padding from OTUs")
otu_clean = os.path.join(tmp, base + '.clean.otus.fa')
amptklib.fasta_strip_padding(ref_clustered, otu_clean)
total = amptklib.countfasta(otu_clean)
amptklib.log.info('{0:,}'.format(total) + ' total OTUs')
#now map reads back to OTUs
uc_out = os.path.join(tmp, base + '.EE' + args.maxee + '.mapping.uc')
otu_table = os.path.join(tmp, base + '.EE' + args.maxee + '.otu_table.txt')
#setup reads to map
if args.map_filtered:
reads = filter_fasta
else:
reads = orig_fasta
amptklib.log.info("Mapping Reads to OTUs and Building OTU table")
cmd = [
'vsearch', '--usearch_global', reads, '--strand', 'plus', '--id',
'0.97', '--db', otu_clean, '--uc', uc_out, '--otutabout', otu_table,
'--threads',
str(cpus)
]
amptklib.runSubprocess(cmd, amptklib.log)
#count reads mapped
total = amptklib.line_count2(uc_out)
amptklib.log.info('{0:,}'.format(total) + ' reads mapped to OTUs ' +
'({0:.0f}%)'.format(total / float(orig_total) * 100))
#Move files around, delete tmp if argument passed.
currentdir = os.getcwd()
final_otu = os.path.join(currentdir, base + '.cluster.otus.fa')
shutil.copyfile(otu_clean, final_otu)
final_otu_table = os.path.join(currentdir, base + '.otu_table.txt')
shutil.copyfile(otu_table, final_otu_table)
if not args.debug:
shutil.rmtree(tmp)
#Print location of files to STDOUT
print("-------------------------------------------------------")
print("OTU Clustering Script has Finished Successfully")
print("-------------------------------------------------------")
if not not args.debug:
print("Tmp Folder of files: %s" % tmp)
print("Clustered OTUs: %s" % os.path.basename(final_otu))
print("OTU Table: %s" % os.path.basename(final_otu_table))
print("-------------------------------------------------------")
otu_print = final_otu.split('/')[-1]
tab_print = final_otu_table.split('/')[-1]
if 'darwin' in sys.platform:
print(colr.WARN + "\nExample of next cmd:" + colr.END +
" amptk filter -i %s -f %s -b <mock barcode>\n" %
(tab_print, otu_print))
else:
print(
"\nExample of next cmd: amptk filter -i %s -f %s -b <mock barcode>\n"
% (tab_print, otu_print))
def main(args): parser=argparse.ArgumentParser(prog='amptk-fastq2sra.py', usage="%(prog)s [options] -i folder", description='''Script to split FASTQ file from Ion, 454, or Illumina by barcode sequence into separate files for submission to SRA. This script can take the BioSample worksheet from NCBI and create an SRA metadata file for submission.''', epilog="""Written by Jon Palmer (2015) [email protected]""", formatter_class=MyFormatter) parser.add_argument('-i','--input', dest='FASTQ', required=True, help='Input FASTQ file or folder') parser.add_argument('-o','--out', dest='out', help='Basename for output folder/files') parser.add_argument('--min_len', default=50, type=int, help='Minimum length of read to keep') parser.add_argument('-b','--barcode_fasta', help='Multi-fasta file containing barcodes used') parser.add_argument('--reverse_barcode', help='Reverse barcode fasta file') parser.add_argument('-s','--biosample', dest='biosample', help='BioSample file from NCBI') parser.add_argument('-p','--platform', dest='platform', default='ion', choices=['ion', 'illumina', '454'], help='Sequencing platform') parser.add_argument('-f','--fwd_primer', dest="F_primer", default='fITS7', help='Forward Primer (fITS7)') parser.add_argument('-r','--rev_primer', dest="R_primer", default='ITS4', help='Reverse Primer (ITS4)') parser.add_argument('-n', '--names', help='CSV mapping file BC,NewName') parser.add_argument('-d', '--description', help='Paragraph description for SRA metadata') parser.add_argument('-t','--title', default='Fungal ITS', help='Start of title for SRA submission, name it according to amplicon') parser.add_argument('-m','--mapping_file', help='Mapping file: QIIME format can have extra meta data columns') parser.add_argument('--primer_mismatch', default=2, type=int, help='Number of mis-matches in primer') parser.add_argument('--barcode_mismatch', default=0, type=int, help='Number of mis-matches in barcode') parser.add_argument('--require_primer', default='off', choices=['forward', 'both', 'off'], help='Require Primers to be present') parser.add_argument('--force', action='store_true', help='Overwrite existing directory') parser.add_argument('-a','--append', help='Append a name to all sample names for a run, i.e. --append run1 would yield Sample_run1') args=parser.parse_args(args) #get basename if not args.out passed if args.out: base = args.out else: if 'demux' in args.FASTQ: base = os.path.basename(args.FASTQ).split('.demux')[0] else: base = os.path.basename(args.FASTQ).split('.f')[0] log_name = base + '.amptk-sra.log' if os.path.isfile(log_name): os.remove(log_name) amptklib.setupLogging(log_name) FNULL = open(os.devnull, 'w') cmd_args = " ".join(sys.argv)+'\n' amptklib.log.debug(cmd_args) print("-------------------------------------------------------") amptklib.SystemInfo() amptkversion = amptklib.get_version() #create output directory if not os.path.exists(base): os.makedirs(base) else: if not args.force: amptklib.log.error("Directory %s exists, add --force argument to overwrite" % base) sys.exit(1) else: shutil.rmtree(base) os.makedirs(base) #parse a mapping file or a barcode fasta file, primers, etc get setup #dealing with Barcodes, get ion barcodes or parse the barcode_fasta argument barcode_file = os.path.join(base, base + ".barcodes_used.fa") rev_barcode_file = os.path.join(base, base + ".revbarcodes_used.fa") if os.path.isfile(barcode_file): os.remove(barcode_file) #check if mapping file passed, use this if present, otherwise use command line arguments SampleData = {} Barcodes = {} RevBarcodes = {} FwdPrimer = '' RevPrimer = '' if args.mapping_file: if not os.path.isfile(args.mapping_file): amptklib.log.error("Mapping file not found: %s" % args.mapping_file) sys.exit(1) SampleData, Barcodes, RevBarcodes, FwdPrimer, RevPrimer = amptklib.parseMappingFileNEW(args.mapping_file) else: if args.barcode_fasta: with open(barcode_file, 'w') as barcodeout: with open(args.barcode_fasta, 'r') as input: for rec in SeqIO.parse(input, 'fasta'): outname = args.multi+'.'+rec.id barcodeout.write(">%s\n%s\n" % (outname, rec.seq)) if args.reverse_barcode: with open(rev_barcode_file, 'w') as barcodeout: with open(args.reverse_barcode, 'r') as input: for rec in SeqIO.parse(input, 'fasta'): outname = args.multi+'.'+rec.id barcodeout.write(">%s\n%s\n" % (outname, rec.seq)) #parse primers here so doesn't conflict with mapping primers #look up primer db otherwise default to entry if FwdPrimer == '': if args.F_primer in amptklib.primer_db: FwdPrimer = amptklib.primer_db.get(args.F_primer) amptklib.log.info("{:} fwd primer found in AMPtk primer db, setting to: {:}".format(args.F_primer, FwdPrimer)) else: FwdPrimer = args.F_primer amptklib.log.info("{:} fwd primer not found in AMPtk primer db, assuming it is actual primer sequence.".format(args.F_primer)) if RevPrimer == '': if args.R_primer in amptklib.primer_db: RevPrimer = amptklib.primer_db.get(args.R_primer) amptklib.log.info("{:} rev primer found in AMPtk primer db, setting to: {:}".format(args.R_primer, RevPrimer)) else: RevPrimer = args.R_primer amptklib.log.info("{:} rev primer not found in AMPtk primer db, assuming it is actual primer sequence.".format(args.R_primer)) #then setup barcode dictionary if len(Barcodes) < 1 and os.path.isfile(barcode_file): Barcodes = amptklib.fasta2barcodes(barcode_file, False) #setup for looking for reverse barcode if len(RevBarcodes) < 1 and args.reverse_barcode: if not os.path.isfile(args.reverse_barcode): amptklib.log.info("Reverse barcode is not a valid file, exiting") sys.exit(1) shutil.copyfile(args.reverse_barcode, rev_barcode_file) RevBarcodes = amptklib.fasta2barcodes(rev_barcode_file, True) if args.platform != 'illumina': if not args.mapping_file and not args.barcode_fasta: amptklib.log.error("For ion, 454, or illumina2 datasets you must specificy a multi-fasta file containing barcodes with -b, --barcode_fasta, or -m/--mapping_file") sys.exit(1) if args.platform == 'illumina': #just need to get the correct .fastq.gz files into a folder by themselves #if illumina is selected, verify that args.fastq is a folder if not os.path.isdir(args.FASTQ): amptklib.log.error("%s is not a folder, for '--platform illumina', -i must be a folder containing raw reads" % (args.FASTQ)) sys.exit(1) rawlist = [] filelist = [] for file in os.listdir(args.FASTQ): if file.endswith(".fastq.gz") or file.endswith('.fastq') or file.endswith('.fq'): rawlist.append(file) if len(rawlist) > 0: if not '_R2' in sorted(rawlist)[1]: amptklib.log.info("Found %i single files, copying to %s folder" % (len(rawlist), base)) filelist = rawlist for file in rawlist: shutil.copyfile(os.path.join(args.FASTQ,file),(os.path.join(base,file))) else: amptklib.log.info("Found %i paired-end files, copying to %s folder" % (len(rawlist) / 2, base)) for file in rawlist: shutil.copyfile(os.path.join(args.FASTQ,file),(os.path.join(base,file))) if '_R1' in file: filelist.append(file) else: #start here to process the reads, first reverse complement the reverse primer ReverseCompRev = amptklib.RevComp(RevPrimer) #if --names given, load into dictonary if args.names: amptklib.log.info("Parsing names for output files via %s" % args.names) namesDict = {} with open(args.names, 'r') as input: for line in input: line = line.replace('\n', '') cols = line.split(',') if not cols[0] in namesDict: namesDict[cols[0]] = cols[1] #check for compressed input file if args.FASTQ.endswith('.gz'): amptklib.log.info("Gzipped input files detected, uncompressing") FASTQ_IN = args.FASTQ.replace('.gz', '') amptklib.Funzip(args.FASTQ, FASTQ_IN, multiprocessing.cpu_count()) else: FASTQ_IN = args.FASTQ #count FASTQ records in input amptklib.log.info("Loading FASTQ Records") total = amptklib.countfastq(FASTQ_IN) size = amptklib.checkfastqsize(args.FASTQ) readablesize = amptklib.convertSize(size) amptklib.log.info('{0:,}'.format(total) + ' reads (' + readablesize + ')') #output message depending on primer requirement if args.require_primer == 'off': amptklib.log.info("Looking for %i barcodes" % (len(Barcodes))) elif args.require_primer == 'forward': amptklib.log.info("Looking for %i barcodes that must have FwdPrimer: %s" % (len(Barcodes), FwdPrimer)) elif args.require_primer == 'both': amptklib.log.info("Looking for %i barcodes that must have FwdPrimer: %s and RevPrimer: %s" % (len(Barcodes), FwdPrimer, RevPrimer)) #this will loop through FASTQ file once, splitting those where barcodes are found, and primers trimmed runningTotal = 0 with open(FASTQ_IN, 'r') as input: for title, seq, qual in FastqGeneralIterator(input): Barcode, BarcodeLabel = amptklib.AlignBarcode(seq, Barcodes, args.barcode_mismatch) if Barcode == "": continue #trim barcode from sequence BarcodeLength = len(Barcode) seq = seq[BarcodeLength:] qual = qual[BarcodeLength:] #look for forward primer if args.require_primer != 'off': #means we only want ones with forward primer and or reverse, but don't remove them #now search for forward primer foralign = edlib.align(FwdPrimer, seq, mode="HW", k=args.primer_mismatch, additionalEqualities=amptklib.degenNuc) if foralign["editDistance"] < 0: continue if args.require_primer == 'both': #now search for reverse primer revalign = edlib.align(ReverseCompRev, seq, mode="HW", task="locations", k=args.primer_mismatch, additionalEqualities=amptklib.degenNuc) if revalign["editDistance"] < 0: #reverse primer was not found continue #check size if len(seq) < args.min_len: #filter out sequences less than minimum length. continue runningTotal += 1 fileout = os.path.join(base, BarcodeLabel+'.fastq') with open(fileout, 'a') as output: output.write("@%s\n%s\n+\n%s\n" % (title, seq, qual)) if args.require_primer == 'off': amptklib.log.info('{0:,}'.format(runningTotal) + ' total reads with valid barcode') elif args.require_primer == 'forward': amptklib.log.info('{0:,}'.format(runningTotal) + ' total reads with valid barcode and fwd primer') elif args.require_primer == 'both': amptklib.log.info('{0:,}'.format(runningTotal) + ' total reads with valid barcode and both primers') amptklib.log.info("Now Gzipping files") for file in os.listdir(base): if file.endswith(".fastq"): file_path = os.path.join(base, file) amptklib.Fzip_inplace(file_path) #after all files demuxed into output folder, loop through and create SRA metadata file filelist = [] for file in os.listdir(base): if file.endswith(".fastq.gz"): filelist.append(file) amptklib.log.info("Finished: output in %s" % base) #clean up if gzipped if args.FASTQ.endswith('.gz'): amptklib.removefile(FASTQ_IN) #check for BioSample meta file if args.biosample: amptklib.log.info("NCBI BioSample file detected, creating SRA metadata file") #load in BioSample file to dictionary with open(args.biosample, 'r') as input: reader = csv.reader(input, delimiter=str('\t')) header = next(reader) acc = header.index('Accession') sample = header.index('Sample Name') bio = header.index('BioProject') try: host = header.index('Host') except ValueError: host = header.index('Organism') BioDict = {col[sample]:(col[acc],col[bio],col[host]) for col in reader} #set some defaults based on the platform header = 'bioproject_accession\tbiosample_accession\tlibrary_ID\ttitle\tlibrary_strategy\tlibrary_source\tlibrary_selection\tlibrary_layout\tplatform\tinstrument_model\tdesign_description\tfiletype\tfilename\tfilename2\tforward_barcode\treverse_barcode\tforward_primer\treverse_primer\n' if args.platform == 'ion': sequencer = 'ION_TORRENT' model = 'Ion Torrent PGM' lib_layout = 'single' elif args.platform == '454': sequencer = '_LS454' model = '454 GS FLX Titanium' lib_layout = 'single' elif args.platform == 'illumina': sequencer = 'ILLUMINA' model = 'Illumina MiSeq' lib_layout = 'paired' else: amptklib.log.error("You specified a platform that is not supported") sys.exit(1) lib_strategy = 'AMPLICON' lib_source = 'GENOMIC' lib_selection = 'RANDOM PCR' filetype = 'fastq' #now open file for writing, input header and then loop through samples sub_out = base + '.submission.txt' with open(sub_out, 'w') as output: output.write(header) for file in filelist: barcode_for = '' barcode_rev = '' if not args.description: description = '%s amplicon library was created using a barcoded fusion primer PCR protocol using Pfx50 polymerase (Thermo Fisher Scientific), size selected, and sequenced on the %s platform. Sequence data was minimally processed, sequences were exported directly from the sequencing platform and only the barcode (index sequence) was trimmed prior to SRA submission. SRA submission generated with AMPtk %s' % (args.title, model, amptkversion.split(' ')[-1]) else: description = args.description if args.platform == 'ion' or args.platform == '454': name = file.split(".fastq")[0] if not name in BioDict: #lets try to look a bit harder, i.e. split on _ and - and look again searchname = name.replace('-', '_') searchname = searchname.split('_')[0] if not searchname in BioDict: #if still not found, then skip continue else: searchname = name bioproject = BioDict.get(searchname)[1] if not bioproject.startswith('PRJNA'): bioproject = 'PRJNA'+bioproject sample_name = BioDict.get(searchname)[0] title = '%s amplicon sequencing of %s: sample %s' % (args.title, BioDict.get(name)[2], name) bc_name = file.split(".f")[0] if bc_name in Barcodes: barcode_for = Barcodes.get(bc_name) if bc_name in RevBarcodes: barcode_rev = RevBarcodes.get(bc_name) if args.append: finalname = name+'_'+args.append #also need to change the name for output files newfile = file.replace(name, finalname) os.rename(os.path.join(base, file), os.path.join(base, newfile)) else: finalname = name newfile = file line = [bioproject,sample_name,finalname,title,lib_strategy,lib_source,lib_selection,lib_layout,sequencer,model,description,filetype,newfile,'',barcode_for,barcode_rev,FwdPrimer,RevPrimer] elif args.platform == 'illumina': name = file.split("_")[0] if not name in BioDict: amptklib.log.info('{:} not found in BioSample text file'.format(name)) continue bioproject = BioDict.get(name)[1] if not bioproject.startswith('PRJNA'): bioproject = 'PRJNA'+bioproject sample_name = BioDict.get(name)[0] title = '%s amplicon sequencing of %s: sample %s' % (args.title, BioDict.get(name)[2], name) file2 = file.replace('_R1', '_R2') #count number of _ in name, determines the dataformat fields = file.count("_") if fields > 3: #this is full illumina name with dual barcodes dualBC = file.split("_")[1] if '-' in dualBC: barcode_for = dualBC.split('-')[0] barcode_rev = dualBC.split('-')[1] elif fields == 3: #this is older reverse barcoded name barcode_for = '' barcode_rev = file.split("_")[1] if args.append: finalname = name+'_'+args.append newfile = file.replace(name, finalname) newfile2 = file2.replace(name, finalname) #also need to change the name for output files os.rename(os.path.join(base, file), os.path.join(base, newfile1)) os.rename(os.path.join(base, file2), os.path.join(base, newfile2)) file = file.replace(name, finalname) else: finalname = name newfile = file newfile2 = file2 line = [bioproject,sample_name,finalname,title,lib_strategy,lib_source,lib_selection,lib_layout,sequencer,model,description,filetype,newfile,newfile2,barcode_for,barcode_rev,FwdPrimer,RevPrimer] #write output to file output.write('\t'.join(line)+'\n') amptklib.log.info("SRA submission file created: %s" % sub_out)
def main(args):
parser = argparse.ArgumentParser(
prog='amptk-assign_taxonomy.py',
usage="%(prog)s [options] -f <FASTA File>",
description='''assign taxonomy to OTUs''',
epilog="""Written by Jon Palmer (2015) [email protected]""",
formatter_class=MyFormatter)
parser.add_argument('-i',
'--otu_table',
dest="otu_table",
help='Append Taxonomy to OTU table')
parser.add_argument('-f', '--fasta', required=True, help='FASTA input')
parser.add_argument('-o', '--out', help='Output file (FASTA)')
parser.add_argument(
'-m',
'--mapping_file',
help='Mapping file: QIIME format can have extra meta data columns')
parser.add_argument(
'--method',
default='hybrid',
choices=['utax', 'usearch', 'sintax', 'hybrid', 'rdp', 'blast'],
help='Taxonomy method')
parser.add_argument(
'-d',
'--db',
help='Pre-installed Databases: [ITS,ITS1,ITS2,16S,LSU,COI]')
parser.add_argument(
'-t',
'--taxonomy',
help='Incorporate taxonomy calculated elsewhere, 2 column file')
parser.add_argument('--fasta_db',
help='Alternative database of fasta sequences')
parser.add_argument('--add2db',
help='Custom FASTA database to add to DB on the fly')
parser.add_argument('--utax_db', help='UTAX Reference Database')
parser.add_argument('--utax_cutoff',
default=0.8,
type=restricted_float,
help='UTAX confidence value threshold.')
parser.add_argument('--usearch_db', help='USEARCH Reference Database')
parser.add_argument('--usearch_cutoff',
default=0.7,
type=restricted_float,
help='USEARCH percent ID threshold.')
parser.add_argument(
'-r',
'--rdp',
dest='rdp',
default='/Users/jon/scripts/rdp_classifier_2.10.1/dist/classifier.jar',
help='Path to RDP Classifier')
parser.add_argument('--rdp_db',
dest='rdp_tax',
default='fungalits_unite',
choices=[
'16srrna', 'fungallsu', 'fungalits_warcup',
'fungalits_unite'
],
help='Training set for RDP Classifier')
parser.add_argument('--rdp_cutoff',
default=0.8,
type=restricted_float,
help='RDP confidence value threshold')
parser.add_argument('--local_blast', help='Path to local Blast DB')
parser.add_argument('-u',
'--usearch',
dest="usearch",
default='usearch9',
help='USEARCH8 EXE')
parser.add_argument('--tax_filter',
help='Retain only OTUs with match in OTU table')
parser.add_argument('--sintax_cutoff',
default=0.8,
type=restricted_float,
help='SINTAX threshold.')
parser.add_argument('--debug',
action='store_true',
help='Remove Intermediate Files')
parser.add_argument('--cpus',
type=int,
help="Number of CPUs. Default: auto")
args = parser.parse_args(args)
parentdir = os.path.join(os.path.dirname(amptklib.__file__))
if not args.out:
#get base name of files
if 'filtered' in args.fasta:
base = args.fasta.split(".filtered")[0]
elif 'otu' in args.fasta:
base = args.fasta.split('.otu')[0]
else:
base = args.fasta.split('.fa')[0]
else:
base = args.out
#remove logfile if exists
log_name = base + '.amptk-taxonomy.log'
if os.path.isfile(log_name):
os.remove(log_name)
amptklib.setupLogging(log_name)
FNULL = open(os.devnull, 'w')
cmd_args = " ".join(sys.argv) + '\n'
amptklib.log.debug(cmd_args)
print("-------------------------------------------------------")
#initialize script, log system info and usearch version
amptklib.SystemInfo()
#Do a version check
usearch = args.usearch
amptklib.versionDependencyChecks(usearch)
#get number of cpus
if args.cpus:
cpus = args.cpus
else:
cpus = amptklib.getCPUS()
#Setup DB locations and names, etc
DBdir = os.path.join(parentdir, 'DB')
DataBase = {
'ITS1': (os.path.join(DBdir,
'ITS.udb'), os.path.join(DBdir, 'ITS1_UTAX.udb'),
os.path.join(DBdir, 'ITS_SINTAX.udb')),
'ITS2': (os.path.join(DBdir,
'ITS.udb'), os.path.join(DBdir, 'ITS2_UTAX.udb'),
os.path.join(DBdir, 'ITS_SINTAX.udb')),
'ITS': (os.path.join(DBdir,
'ITS.udb'), os.path.join(DBdir, 'ITS_UTAX.udb'),
os.path.join(DBdir, 'ITS_SINTAX.udb')),
'16S': (os.path.join(DBdir, '16S.udb'), os.path.join(DBdir, '16S.udb'),
os.path.join(DBdir, '16S_SINTAX.udb')),
'LSU': (os.path.join(DBdir,
'LSU.udb'), os.path.join(DBdir, 'LSU_UTAX.udb'),
os.path.join(DBdir, 'LSU_SINTAX.udb')),
'COI': (os.path.join(DBdir,
'COI.udb'), os.path.join(DBdir, 'COI_UTAX.udb'),
os.path.join(DBdir, 'COI_SINTAX.udb'))
}
#get DB names up front
if args.db in DataBase:
utax_db = DataBase.get(args.db)[1]
usearch_db = DataBase.get(args.db)[0]
sintax_db = DataBase.get(args.db)[2]
if not utax_db:
utax_db = args.utax_db
if not usearch_db:
usearch_db = args.usearch_db
else:
utax_db = args.utax_db
usearch_db = args.usearch_db
if args.fasta_db:
sintax_db = args.fasta_db
else:
sintax_db = args.usearch_db
if args.method in ['hybrid', 'usearch', 'utax']:
if not utax_db and not usearch_db and not args.fasta_db:
amptklib.log.error(
"You have not selected a database, need either --db, --utax_db, --usearch_db, or --fasta_db"
)
sys.exit(1)
else: #check that the DB exists
if args.method == 'usearch' and usearch_db:
if not amptklib.checkfile(usearch_db):
amptklib.log.error(
'USEARCH DB not found: {:}'.format(usearch_db))
amptklib.log.derror(
'Use `amptk install` to install pre-formatted databases or `amptk database` to create custom DB'
)
sys.exit(1)
if args.method == 'sintax' and sintax_db:
if not amptklib.checkfile(sintax_db):
amptklib.log.error(
'SINTAX DB not found: {:}'.format(sintax_db))
amptklib.log.derror(
'Use `amptk install` to install pre-formatted databases or `amptk database` to create custom DB'
)
sys.exit(1)
if args.method == 'utax' and utax_db:
if not amptklib.checkfile(utax_db):
amptklib.log.error(
'UTAX DB not found: {:}'.format(utax_db))
amptklib.log.error(
'Use `amptk install` to install pre-formatted databases or `amptk database` to create custom DB'
)
sys.exit(1)
custom_db = None
if args.add2db: #means user wants to add sequences to the usearch database on the so will need to rebuild database
custom_db = base + '.custom_database.fa'
if amptklib.checkfile(custom_db):
amptklib.SafeRemove(custom_db)
if args.db: #this means that the fasta files need to be extracted
amptklib.log.info("Adding {:} to the {:} database".format(
os.path.basename(args.add2db), os.path.basename(usearch_db)))
cmd = ['vsearch', '--udb2fasta', usearch_db, '--output', custom_db]
amptklib.runSubprocess(cmd, amptklib.log)
with open(custom_db, 'a') as outfile:
with open(args.add2db, 'r') as infile:
shutil.copyfileobj(infile, outfile)
elif args.fasta_db:
amptklib.log.info("Adding {:} to the {:} database".format(
os.path.basename(args.add2db),
os.path.basename(args.fasta_db)))
with open(custom_db, 'w') as outfile:
with open(args.fasta_db, 'r') as infile:
shutil.copyfileobj(infile, outfile)
with open(args.add2db, 'r') as infile:
shutil.copyfileobj(infile, outfile)
#Count records
amptklib.log.info("Loading FASTA Records")
total = amptklib.countfasta(args.fasta)
amptklib.log.info('{0:,}'.format(total) + ' OTUs')
#declare output files/variables here
blast_out = base + '.blast.txt'
rdp_out = base + '.rdp.txt'
utax_out = base + '.usearch.txt'
usearch_out = base + '.usearch.txt'
sintax_out = base + '.sintax.txt'
otuDict = {}
if not args.taxonomy:
#start with less common uses, i.e. Blast, rdp
if args.method == 'blast':
#check if command line blast installed
if not amptklib.which('blastn'):
amptklib.log.error("BLASTN not found in your PATH, exiting.")
sys.exit(1)
#now run blast remotely using NCBI nt database
outformat = "6 qseqid sseqid pident stitle"
if args.local_blast:
#get number of cpus
amptklib.log.info("Running local BLAST using db: %s" %
args.local_blast)
cmd = [
'blastn', '-num_threads',
str(cpus), '-query', args.fasta, '-db',
os.path.abspath(args.local_blast), '-max_target_seqs', '1',
'-outfmt', outformat, '-out', blast_out
]
amptklib.runSubprocess(cmd, amptklib.log)
else:
amptklib.log.info(
"Running BLASTN using NCBI remote nt database, this may take awhile"
)
cmd = [
'blastn', '-query', args.fasta, '-db', 'nt', '-remote',
'-max_target_seqs', '1', '-outfmt', outformat, '-out',
blast_out
]
amptklib.runSubprocess(cmd, amptklib.log)
#load results and reformat
new = []
f = csv.reader(open(blast_out), delimiter=str('\t'))
for col in f:
query = col[0]
gbID = col[1].split("|")[3]
pident = col[2]
name = col[3]
tax = gbID + ";" + name + " (" + pident + ")"
line = [query, tax]
new.append(line)
otuDict = dict(new)
elif args.method == 'rdp':
#check that classifier is installed
try:
rdp_test = subprocess.Popen(
['java', '-Xmx2000m', '-jar', args.rdp, 'classify'],
stdout=subprocess.PIPE).communicate()[0].rstrip()
except OSError:
amptklib.log.error("%s not found in your PATH, exiting." %
args.rdp)
sys.exit(1)
#RDP database
amptklib.log.info("Using RDP classifier %s training set" %
args.rdp_tax)
#run RDP
cmd = [
'java', '-Xmx2000m', '-jar', args.rdp, 'classify', '-g',
args.rdp_tax, '-o', rdp_out, '-f', 'fixrank', args.fasta
]
amptklib.runSubprocess(cmd, amptklib.log)
#load in results and put into dictionary
new = []
removal = ["unidentified", "Incertae", "uncultured", "incertae"]
remove_exp = [re.compile(x) for x in removal]
f = csv.reader(open(rdp_out), delimiter=str('\t'))
for col in f:
if float(col[19]) > args.rdp_cutoff:
tax = "RDP;k:" + col[2] + ",p:" + col[5] + ",c:" + col[
8] + ",o:" + col[11] + ",f:" + col[14] + ",g:" + col[17]
elif float(col[16]) > args.rdp_cutoff:
tax = "RDP;k:" + col[2] + ",p:" + col[5] + ",c:" + col[
8] + ",o:" + col[11] + ",f:" + col[14]
elif float(col[13]) > args.rdp_cutoff:
tax = "RDP;k:" + col[2] + ",p:" + col[5] + ",c:" + col[
8] + ",o:" + col[11]
elif float(col[10]) > args.rdp_cutoff:
tax = "RDP;k:" + col[2] + ",p:" + col[5] + ",c:" + col[8]
elif float(col[7]) > args.rdp_cutoff:
tax = "RDP;k:" + col[2] + ",p:" + col[5]
elif float(col[4]) > args.rdp_cutoff:
tax = "RDP;k:" + col[2]
else:
tax = "RDP;k:unclassified"
tax_split = tax.split(",")
tax = [
s for s in tax_split
if not any(re.search(s) for re in remove_exp)
]
tax = ",".join(tax)
line = [col[0], tax]
new.append(line)
otuDict = dict(new)
else:
#check status of USEARCH DB and run
if args.method in ['hybrid', 'usearch']:
if args.fasta_db:
#now run through usearch global
amptklib.log.info(
"Global alignment OTUs with usearch_global (VSEARCH) against {:}"
.format(os.path.basename(args.fasta_db)))
cmd = [
'vsearch', '--usearch_global', args.fasta, '--db',
os.path.abspath(args.fasta_db), '--userout',
usearch_out, '--id',
str(args.usearch_cutoff), '--strand', 'both',
'--output_no_hits', '--maxaccepts', '0',
'--top_hits_only', '--userfields', 'query+target+id',
'--notrunclabels', '--threads',
str(cpus)
]
amptklib.runSubprocess(cmd, amptklib.log)
elif custom_db:
#now run through usearch global
amptklib.log.info(
"Global alignment OTUs with usearch_global (VSEARCH) against custom DB"
)
cmd = [
'vsearch', '--usearch_global', args.fasta, '--db',
os.path.abspath(custom_db), '--userout', usearch_out,
'--id',
str(args.usearch_cutoff), '--strand', 'both',
'--output_no_hits', '--maxaccepts', '0',
'--top_hits_only', '--userfields', 'query+target+id',
'--notrunclabels', '--threads',
str(cpus)
]
amptklib.runSubprocess(cmd, amptklib.log)
else:
if usearch_db:
amptklib.log.info(
"Global alignment OTUs with usearch_global (VSEARCH) against {:}"
.format(os.path.basename(usearch_db)))
cmd = [
'vsearch', '--usearch_global', args.fasta, '--db',
os.path.abspath(usearch_db), '--userout',
usearch_out, '--id',
str(args.usearch_cutoff), '--strand', 'both',
'--output_no_hits', '--maxaccepts', '0',
'--top_hits_only', '--userfields',
'query+target+id', '--notrunclabels', '--threads',
str(cpus)
]
amptklib.runSubprocess(cmd, amptklib.log)
if args.method in ['hybrid', 'utax']:
if utax_db:
#now run through UTAX
utax_out = base + '.utax.txt'
amptklib.log.info("Classifying OTUs with UTAX (USEARCH)")
cutoff = str(args.utax_cutoff)
cmd = [
usearch, '-utax', args.fasta, '-db', utax_db,
'-utaxout', utax_out, '-utax_cutoff', cutoff,
'-strand', 'plus', '-notrunclabels', '-threads',
str(cpus)
]
amptklib.runSubprocess(cmd, amptklib.log)
else:
amptklib.log.error("UTAX DB %s not found, skipping" %
utax_db)
if args.method in ['hybrid', 'sintax']:
if args.fasta_db: #if you pass fasta file here, over ride any auto detection
sintax_db = args.fasta_db
#now run sintax
amptklib.log.info("Classifying OTUs with SINTAX (USEARCH)")
cmd = [
usearch, '-sintax', args.fasta, '-db',
os.path.abspath(sintax_db), '-tabbedout', sintax_out,
'-sintax_cutoff',
str(args.sintax_cutoff), '-strand', 'both', '-threads',
str(cpus)
]
amptklib.runSubprocess(cmd, amptklib.log)
#now process results, load into dictionary - slightly different depending on which classification was run.
if args.method == 'hybrid':
#run upgraded method, first load dictionaries with resuls
if amptklib.checkfile(utax_out):
utaxDict = amptklib.classifier2dict(
utax_out, args.utax_cutoff)
amptklib.log.debug(
'UTAX results parsed, resulting in {:,} taxonomy predictions'
.format(len(utaxDict)))
else:
amptklib.log.info('UTAX results empty')
utaxDict = {}
if amptklib.checkfile(sintax_out):
sintaxDict = amptklib.classifier2dict(
sintax_out, args.sintax_cutoff)
amptklib.log.debug(
'SINTAX results parsed, resulting in {:,} taxonomy predictions'
.format(len(sintaxDict)))
else:
amptklib.log.info('SINTAX results empty')
sintaxDict = {}
usearchDict = amptklib.usearchglobal2dict(usearch_out)
amptklib.log.debug(
'Global alignment results parsed, resulting in {:,} taxonomy predictions'
.format(len(usearchDict)))
otuList = natsorted(list(usearchDict.keys()))
#first compare classifier results, getting better of the two
bestClassify = amptklib.bestclassifier(utaxDict, sintaxDict,
otuList)
#now get best taxonomy by comparing to global alignment results
otuDict = amptklib.bestTaxonomy(usearchDict, bestClassify)
amptklib.log.debug(
'Combined OTU taxonomy dictionary contains {:,} taxonomy predictions'
.format(len(otuDict)))
if len(otuDict) < 1:
amptklib.log.info('Parsing taxonomy failed -- see logfile')
sys.exit(1)
elif args.method == 'utax' and amptklib.checkfile(utax_out):
#load results into dictionary for appending to OTU table
amptklib.log.debug("Loading UTAX results into dictionary")
with open(utax_out, 'r') as infile:
reader = csv.reader(infile, delimiter=str("\t"))
otuDict = {rows[0]: 'UTAX;' + rows[2] for rows in reader}
elif args.method == 'usearch' and amptklib.checkfile(usearch_out):
#load results into dictionary for appending to OTU table
amptklib.log.debug(
"Loading Global Alignment results into dictionary")
otuDict = {}
usearchDict = amptklib.usearchglobal2dict(usearch_out)
for k, v in natsorted(list(usearchDict.items())):
pident = float(v[0]) * 100
pident = "{0:.1f}".format(pident)
ID = v[1]
tax = ','.join(v[-1])
LCA = v[2]
if LCA == '':
fulltax = 'GS|' + pident + '|' + ID + ';' + tax
else:
fulltax = 'GSL|' + pident + '|' + ID + ';' + tax
otuDict[k] = fulltax
elif args.method == 'sintax' and amptklib.checkfile(sintax_out):
#load results into dictionary for appending to OTU table
amptklib.log.debug("Loading SINTAX results into dictionary")
with open(sintax_out, 'r') as infile:
reader = csv.reader(infile, delimiter=(str("\t")))
otuDict = {rows[0]: 'SINTAX;' + rows[3] for rows in reader}
else:
#you have supplied a two column taxonomy file, parse and build otuDict
amptklib.log.debug("Loading custom Taxonomy into dictionary")
with open(args.taxonomy, 'r') as infile:
reader = csv.reader(infile, delimiter=str("\t"))
otuDict = {rows[0]: rows[1] for rows in reader}
#now format results
if args.otu_table:
#check if otu_table variable is empty, then load in otu table
amptklib.log.info("Appending taxonomy to OTU table and OTUs")
taxTable = base + '.otu_table.taxonomy.txt'
tmpTable = base + '.otu_table.tmp'
#append to OTU table
counts = 0
with open(taxTable, 'w') as outTable:
with open(args.otu_table, 'r') as inTable:
#guess the delimiter format
firstline = inTable.readline()
dialect = amptklib.guess_csv_dialect(firstline)
inTable.seek(0)
#parse OTU table
reader = csv.reader(inTable, dialect)
for line in reader:
if line[0].startswith(("#OTU", "OTUId")):
line.append('Taxonomy')
else:
tax = otuDict.get(line[0]) or "No Hit"
line.append(tax)
if args.tax_filter and not args.method == 'blast':
if line[0].startswith(("#OTU", "OTUId")):
join_line = ('\t'.join(str(x) for x in line))
else:
if args.tax_filter in line[-1]:
join_line = ('\t'.join(str(x) for x in line))
counts += 1
else:
continue
else:
join_line = ('\t'.join(str(x) for x in line))
counts += 1
outTable.write("%s\n" % join_line)
if args.tax_filter:
if args.method == 'blast':
amptklib.log.info(
"Blast is incompatible with --tax_filter, use a different method"
)
tmpTable = args.otu_table
else:
nonfungal = total - counts
amptklib.log.info(
"Found %i OTUs not matching %s, writing %i %s hits to taxonomy OTU table"
% (nonfungal, args.tax_filter, counts, args.tax_filter))
#need to create a filtered table without taxonomy for BIOM output
with open(tmpTable, 'w') as output:
with open(taxTable, 'r') as input:
firstline = input.readline()
dialect = amptklib.guess_csv_dialect(firstline)
input.seek(0)
#parse OTU table
reader = csv.reader(input, dialect)
for line in reader:
del line[-1]
join_line = '\t'.join(str(x) for x in line)
output.write("%s\n" % join_line)
else:
tmpTable = args.otu_table
#append to OTUs
otuTax = base + '.otus.taxonomy.fa'
with open(otuTax, 'w') as output:
with open(args.fasta, 'r') as input:
SeqRecords = SeqIO.parse(input, 'fasta')
for rec in SeqRecords:
tax = otuDict.get(rec.id) or "No hit"
rec.description = tax
SeqIO.write(rec, output, 'fasta')
if not args.taxonomy:
#output final taxonomy in two-column format, followed by the hits for usearch/sintax/utax if hybrid is used.
taxFinal = base + '.taxonomy.txt'
with open(taxFinal, 'w') as finaltax:
if args.method == 'hybrid':
finaltax.write('#OTUID\ttaxonomy\tUSEARCH\tSINTAX\tUTAX\n')
for k, v in natsorted(list(otuDict.items())):
if k in usearchDict:
usearchResult = usearchDict.get(k)
usearchResult = ','.join(usearchResult[-1])
else:
usearchResult = 'No hit'
if k in sintaxDict:
sintaxResult = sintaxDict.get(k)
sintaxResult = ','.join(sintaxResult[-1])
else:
sintaxResult = 'No hit'
if k in utaxDict:
utaxResult = utaxDict.get(k)
utaxResult = ','.join(utaxResult[-1])
else:
utaxResult = 'No hit'
finaltax.write('{:}\t{:}\t{:}\t{:}\t{:}\n'.format(
k, v, usearchResult, sintaxResult, utaxResult))
else:
finaltax.write('#OTUID\ttaxonomy\n')
for k, v in natsorted(list(otuDict.items())):
finaltax.write('%s\t%s\n' % (k, v))
else:
taxFinal = args.taxonomy
#convert taxonomy to qiime format for biom
qiimeTax = None
if not args.method == 'blast':
qiimeTax = base + '.qiime.taxonomy.txt'
amptklib.utax2qiime(taxFinal, qiimeTax)
else:
amptklib.log.error(
"Blast taxonomy is not compatible with BIOM output, use a different method"
)
#create OTU phylogeny for downstream processes
amptklib.log.info("Generating phylogenetic tree")
tree_out = base + '.tree.phy'
cmd = [usearch, '-cluster_agg', args.fasta, '-treeout', tree_out]
amptklib.runSubprocess(cmd, amptklib.log)
#print some summary file locations
amptklib.log.info("Taxonomy finished: %s" % taxFinal)
if args.otu_table and not args.method == 'blast':
amptklib.log.info("Classic OTU table with taxonomy: %s" % taxTable)
#output final OTU table in Biom v1.0 (i.e. json format if biom installed)
outBiom = base + '.biom'
if amptklib.which('biom'):
amptklib.removefile(outBiom)
cmd = [
'biom', 'convert', '-i', tmpTable, '-o', outBiom + '.tmp',
'--table-type', "OTU table", '--to-json'
]
amptklib.runSubprocess(cmd, amptklib.log)
if args.mapping_file:
mapSamples = []
repeatSamples = []
with open(args.mapping_file, 'r') as mapin:
for line in mapin:
line = line.rstrip()
if line.startswith('#'):
continue
sampleID = line.split('\t')[0]
if not sampleID in mapSamples:
mapSamples.append(sampleID)
else:
repeatSamples.append(sampleID)
otuSamples = []
with open(tmpTable, 'r') as otuin:
for line in otuin:
line = line.rstrip()
if line.startswith('#'):
otuSamples = line.split('\t')[1:]
missingMap = []
for otu in otuSamples:
if not otu in mapSamples:
missingMap.append(otu)
if len(missingMap) > 0:
amptklib.log.error(
"%s are missing from mapping file (metadata), skipping biom file creation"
% ', '.join(missingMap))
elif len(repeatSamples) > 0:
amptklib.log.error(
'%s duplicate sample IDs in mapping file, skipping biom file creation'
% ', '.join(repeatSamples))
else:
if qiimeTax:
cmd = [
'biom', 'add-metadata', '-i', outBiom + '.tmp',
'-o', outBiom, '--observation-metadata-fp',
qiimeTax, '-m', args.mapping_file,
'--sc-separated', 'taxonomy', '--output-as-json'
]
else:
cmd = [
'biom', 'add-metadata', '-i', outBiom + '.tmp',
'-o', outBiom, '-m', args.mapping_file,
'--output-as-json'
]
amptklib.runSubprocess(cmd, amptklib.log)
else:
cmd = [
'biom', 'add-metadata', '-i', outBiom + '.tmp', '-o',
outBiom, '--observation-metadata-fp', qiimeTax,
'--sc-separated', 'taxonomy', '--output-as-json'
]
amptklib.runSubprocess(cmd, amptklib.log)
amptklib.removefile(outBiom + '.tmp')
amptklib.log.info("BIOM OTU table created: %s" % outBiom)
else:
amptklib.log.info(
"biom program not installed, install via `pip install biom-format` or `conda install biom-format`"
)
amptklib.log.info("OTUs with taxonomy: %s" % otuTax)
amptklib.log.info("OTU phylogeny: %s" % tree_out)
#clean up intermediate files
if not args.debug:
for i in [
utax_out, usearch_out, sintax_out, qiimeTax,
base + '.otu_table.tmp'
]:
if i:
amptklib.removefile(i)
print("-------------------------------------------------------")
def main(args):
parser = argparse.ArgumentParser(
prog='amptk-stats.py',
description=
'''Script takes BIOM as input and runs basic summary stats''',
epilog="""Written by Jon Palmer (2017) [email protected]""",
formatter_class=MyFormatter)
parser.add_argument('-i',
'--biom',
required=True,
help='Input BIOM file (OTU table + metadata)')
parser.add_argument('-t',
'--tree',
required=True,
help='Phylogentic tree from AMPtk taxonomy')
parser.add_argument('-o',
'--out',
default='amptk_stats',
help='Output folder basename')
parser.add_argument('-d',
'--distance',
default='raupcrick',
choices=[
'raupcrick', 'bray', 'unifrac', 'wunifrac',
'jaccard', 'aitchison', 'all'
],
help="Distance metric")
parser.add_argument('--indicator_species',
action='store_true',
help='Run indicator species analysis')
parser.add_argument('--ignore_otus',
nargs="+",
help='OTUs to drop from table and run stats')
parser.add_argument(
'--ord_method',
default='NMDS',
choices=["DCA", "CCA", "RDA", "DPCoA", "NMDS", "MDS", "PCoA"],
help='Ordination method')
parser.add_argument(
'--ord_ellipse',
action='store_true',
help='Add ellipses on NMDS instead of centroids & error bars')
#parser.add_argument('-t','--treatments', nargs='+', help='treatments (metadata variables) to run, Default: all')
args = parser.parse_args(args)
parentdir = os.path.join(os.path.dirname(amptklib.__file__))
phyloseq_nmds = os.path.join(parentdir, 'phyloseq_nmds.R')
parse_adonis = os.path.join(parentdir, 'parse_adonis.py')
phyloseq_nmds_indicator = os.path.join(parentdir,
'phyloseq_nmds_indicator.R')
if args.indicator_species:
phyloseqCMD = phyloseq_nmds_indicator
else:
phyloseqCMD = phyloseq_nmds
#remove logfile if exists
log_name = args.out + '.amptk-stats.log'
if os.path.isfile(log_name):
amptklib.removefile(log_name)
amptklib.setupLogging(log_name)
FNULL = open(os.devnull, 'w')
cmd_args = " ".join(sys.argv) + '\n'
amptklib.log.debug(cmd_args)
print("-------------------------------------------------------")
#initialize script, log system info and usearch version
amptklib.SystemInfo()
#check dependencies
programs = ['Rscript']
amptklib.CheckDependencies(programs)
Rversions = amptklib.checkRversion()
R_pass = '******'
phyloseq_pass = '******'
#check dada2 first, if good move on, otherwise issue warning
if not amptklib.gvc(Rversions[2], phyloseq_pass):
amptklib.log.error("R v%s; Phyloseq v%s detected, need atleast v%s" %
(Rversions[0], Rversions[2], phyloseq_pass))
amptklib.log.error(
"See: https://joey711.github.io/phyloseq/index.html")
sys.exit(1)
amptklib.log.info("R v%s; Phyloseq v%s" % (Rversions[0], Rversions[2]))
#this is a simple wrapper for an R script so easier to run from amptk menu
if not os.path.isdir(args.out):
os.makedirs(args.out)
phylolog = os.path.join(args.out, 'phyloseq-R.log')
if args.distance == 'all':
distances = ['raupcrick', 'bray', 'unifrac', 'wunifrac', 'jaccard']
amptklib.log.info(
"Running hypothesis test using %s distance metrics on all treatments, drawing %s for each."
% (','.join(distances), args.ord_method))
for dist in distances:
cmd = [
'Rscript', '--vanilla', phyloseqCMD,
os.path.abspath(args.biom),
os.path.abspath(args.tree), args.out, dist, args.ord_method,
str(args.ord_ellipse)
]
if args.ignore_otus:
cmd = cmd + args.ignore_otus
amptklib.runSubprocess3(cmd, amptklib.log, args.out, phylolog)
else:
amptklib.log.info(
"Running hypothesis test using %s distance metric on all treatments, drawing NMDS for each."
% args.distance)
cmd = [
'Rscript', '--vanilla', phyloseqCMD,
os.path.abspath(args.biom),
os.path.abspath(args.tree), args.out, args.distance,
args.ord_method,
str(args.ord_ellipse)
]
if args.ignore_otus:
cmd = cmd + args.ignore_otus
amptklib.runSubprocess3(cmd, amptklib.log, args.out, phylolog)
#parse the adonis output
#amptklib.log.info("Parsing p-values from hyopthesis tests generated in R")
#subprocess.call([parse_adonis, args.out])
amptklib.log.info(
'HTML output files were generated for each treatment: {:}'.format(
args.out))
print("-------------------------------------------------------")
def main(args):
parser = argparse.ArgumentParser(
prog='amptk-dada2.py',
description=
'''Script takes output from amptk pre-processing and runs DADA2''',
epilog="""Written by Jon Palmer (2016) [email protected]""",
formatter_class=MyFormatter)
parser.add_argument('-i',
'--fastq',
required=True,
help='Input Demuxed containing FASTQ')
parser.add_argument('-o', '--out', help='Output Basename')
parser.add_argument(
'-m',
'--min_reads',
default=10,
type=int,
help="Minimum number of reads after Q filtering to run DADA2 on")
parser.add_argument('-l',
'--length',
type=int,
help='Length to truncate reads')
parser.add_argument('-e',
'--maxee',
default='1.0',
help='MaxEE quality filtering')
parser.add_argument('-p',
'--pct_otu',
default='97',
help="Biological OTU Clustering Percent")
parser.add_argument('--platform',
default='ion',
choices=['ion', 'illumina', '454'],
help='Sequencing platform')
parser.add_argument('--chimera_method',
default='consensus',
choices=['consensus', 'pooled', 'per-sample'],
help='bimera removal method')
parser.add_argument('--uchime_ref',
help='Run UCHIME REF [ITS,16S,LSU,COI,custom]')
parser.add_argument('--pool',
action='store_true',
help='Pool all sequences together for DADA2')
parser.add_argument('--debug',
action='store_true',
help='Keep all intermediate files')
parser.add_argument('-u',
'--usearch',
dest="usearch",
default='usearch9',
help='USEARCH9 EXE')
parser.add_argument('--cpus',
type=int,
help="Number of CPUs. Default: auto")
args = parser.parse_args(args)
parentdir = os.path.join(os.path.dirname(amptklib.__file__))
dada2script = os.path.join(parentdir, 'dada2_pipeline_nofilt.R')
#get basename if not args.out passed
if args.out:
base = args.out
else:
if 'demux' in args.fastq:
base = os.path.basename(args.fastq).split('.demux')[0]
else:
base = os.path.basename(args.fastq).split('.f')[0]
#remove logfile if exists
log_name = base + '.amptk-dada2.log'
if os.path.isfile(log_name):
amptklib.removefile(log_name)
amptklib.setupLogging(log_name)
FNULL = open(os.devnull, 'w')
cmd_args = " ".join(sys.argv) + '\n'
amptklib.log.debug(cmd_args)
print("-------------------------------------------------------")
#initialize script, log system info and usearch version
amptklib.SystemInfo()
#Do a version check
usearch = args.usearch
amptklib.versionDependencyChecks(usearch)
#get number of cores
if args.cpus:
CORES = str(args.cpus)
else:
CORES = str(amptklib.getCPUS())
#check dependencies
programs = ['Rscript']
amptklib.CheckDependencies(programs)
Rversions = amptklib.checkRversion()
R_pass = '******'
dada2_pass = '******'
#check dada2 first, if good move on, otherwise issue warning
if not amptklib.gvc(Rversions[1], dada2_pass):
amptklib.log.error("R v%s; DADA2 v%s detected, need atleast v%s" %
(Rversions[0], Rversions[1], dada2_pass))
amptklib.log.error(
"See: http://benjjneb.github.io/dada2/dada-installation.html")
sys.exit(1)
amptklib.log.info("R v%s; DADA2 v%s" % (Rversions[0], Rversions[1]))
#Count FASTQ records and remove 3' N's as dada2 can't handle them
amptklib.log.info("Loading FASTQ Records")
no_ns = base + '.cleaned_input.fq'
if args.fastq.endswith('.gz'):
fastqInput = args.fastq.replace('.gz', '')
amptklib.Funzip(os.path.abspath(args.fastq),
os.path.basename(fastqInput), CORES)
else:
fastqInput = os.path.abspath(args.fastq)
amptklib.fastq_strip_padding(os.path.basename(fastqInput), no_ns)
demuxtmp = base + '.original.fa'
cmd = [
'vsearch', '--fastq_filter',
os.path.abspath(no_ns), '--fastq_qmax', '55', '--fastaout', demuxtmp,
'--threads', CORES
]
amptklib.runSubprocess(cmd, amptklib.log)
orig_total = amptklib.countfasta(demuxtmp)
size = amptklib.checkfastqsize(no_ns)
readablesize = amptklib.convertSize(size)
amptklib.log.info('{0:,}'.format(orig_total) + ' reads (' + readablesize +
')')
#quality filter
amptklib.log.info("Quality Filtering, expected errors < %s" % args.maxee)
derep = base + '.qual-filtered.fq'
filtercmd = [
'vsearch', '--fastq_filter', no_ns, '--fastq_maxee',
str(args.maxee), '--fastqout', derep, '--fastq_qmax', '55',
'--fastq_maxns', '0', '--threads', CORES
]
amptklib.runSubprocess(filtercmd, amptklib.log)
total = amptklib.countfastq(derep)
amptklib.log.info('{0:,}'.format(total) + ' reads passed')
#split into individual files
amptklib.log.info("Splitting FASTQ file by Sample into individual files")
filtfolder = base + '_filtered'
if os.path.isdir(filtfolder):
shutil.rmtree(filtfolder)
os.makedirs(filtfolder)
splitDemux2(derep, filtfolder, args=args)
#check for minimum number of reads in each sample
remove = []
files = [i for i in os.listdir(filtfolder) if i.endswith('.fastq')]
for x in files:
if amptklib.countfastq(os.path.join(filtfolder, x)) < args.min_reads:
remove.append(x)
if len(remove) > 0:
amptklib.log.info("Dropping %s as fewer than %i reads" %
(', '.join(remove), args.min_reads))
for y in remove:
os.remove(os.path.join(filtfolder, y))
#now run DADA2 on filtered folder
amptklib.log.info("Running DADA2 pipeline")
dada2log = base + '.dada2.Rscript.log'
dada2out = base + '.dada2.csv'
#check pooling vs notpooled, default is not pooled.
if args.pool:
POOL = 'TRUE'
else:
POOL = 'FALSE'
with open(dada2log, 'w') as logfile:
subprocess.call([
'Rscript', '--vanilla', dada2script, filtfolder, dada2out,
args.platform, POOL, CORES, args.chimera_method
],
stdout=logfile,
stderr=logfile)
#check for results
if not os.path.isfile(dada2out):
amptklib.log.error("DADA2 run failed, please check %s logfile" %
dada2log)
sys.exit(1)
#now process the output, pull out fasta, rename, etc
fastaout = base + '.otus.tmp'
OTUCounts = {}
counter = 1
with open(fastaout, 'w') as writefasta:
with open(dada2out, 'r') as input:
next(input)
for line in input:
line = line.replace('\n', '')
line = line.replace('"', '')
cols = line.split(',')
Seq = cols[0]
countList = [int(x) for x in cols[1:]]
counts = sum(countList)
ID = 'ASV' + str(counter)
if not ID in OTUCounts:
OTUCounts[ID] = counts
writefasta.write(">%s\n%s\n" % (ID, Seq))
counter += 1
#get number of bimeras from logfile
with open(dada2log, 'r') as bimeracheck:
for line in bimeracheck:
if line.startswith('Identified '):
bimeraline = line.split(' ')
bimeras = int(bimeraline[1])
totalSeqs = int(bimeraline[5])
validSeqs = totalSeqs - bimeras
amptklib.log.info('{0:,}'.format(totalSeqs) +
' total amplicon sequence variants (ASVs)')
amptklib.log.info('{0:,}'.format(bimeras) + ' denovo chimeras removed')
amptklib.log.info('{0:,}'.format(validSeqs) + ' valid ASVs')
#optional UCHIME Ref
uchime_out = base + '.nonchimeras.fa'
chimeraFreeTable = base + '.otu_table.txt'
iSeqs = base + '.ASVs.fa'
if not args.uchime_ref:
os.rename(fastaout, iSeqs)
else:
#check if file is present, remove from previous run if it is.
if os.path.isfile(iSeqs):
amptklib.removefile(iSeqs)
#R. Edgar now says using largest DB is better for UCHIME, so use the one distributed with taxonomy
if args.uchime_ref in [
'ITS', '16S', 'LSU', 'COI'
]: #test if it is one that is setup, otherwise default to full path
uchime_db = os.path.join(parentdir, 'DB', args.uchime_ref + '.udb')
if not os.path.isfile(uchime_db):
amptklib.log.error(
"Database not properly configured, run `amptk install` to setup DB, skipping chimera filtering"
)
uchime_out = fastaout
#since uchime cannot work with udb database, need to extract fasta sequences, do this if
if not amptklib.checkfile(
os.path.join(parentdir, 'DB',
args.uchime_ref + '.extracted.fa')):
uchime_db = os.path.join(parentdir, 'DB',
args.uchime_ref + '.extracted.fa')
cmd = [
'vsearch', '--udb2fasta',
os.path.join(parentdir, 'DB', args.uchime_ref + '.udb'),
'--output', uchime_db
]
amptklib.runSubprocess(cmd, amptklib.log)
else:
uchime_db = os.path.join(parentdir, 'DB',
args.uchime_ref + '.extracted.fa')
else:
if os.path.isfile(args.uchime_ref):
uchime_db = os.path.abspath(args.uchime_ref)
else:
amptklib.log.error(
"%s is not a valid file, skipping reference chimera filtering"
% args.uchime_ref)
iSeqs = fastaout
#now run chimera filtering if all checks out
if not os.path.isfile(iSeqs):
amptklib.log.info("Chimera Filtering (VSEARCH) using %s DB" %
args.uchime_ref)
cmd = [
'vsearch', '--mindiv', '1.0', '--uchime_ref', fastaout, '--db',
uchime_db, '--nonchimeras', iSeqs, '--threads', CORES
]
amptklib.runSubprocess(cmd, amptklib.log)
total = amptklib.countfasta(iSeqs)
uchime_chimeras = validSeqs - total
amptklib.log.info('{0:,}'.format(total) + ' ASVs passed, ' +
'{0:,}'.format(uchime_chimeras) +
' ref chimeras removed')
if os.path.isfile(fastaout):
amptklib.removefile(fastaout)
#setup output files
dadademux = base + '.dada2.map.uc'
bioSeqs = base + '.cluster.otus.fa'
bioTable = base + '.cluster.otu_table.txt'
uctmp = base + '.map.uc'
ClusterComp = base + '.ASVs2clusters.txt'
#Filter out ASVs in wrong orientation
amptklib.log.info('Validating ASV orientation')
os.rename(iSeqs, iSeqs + '.bak')
numKept, numDropped = amptklib.validateorientationDADA2(
OTUCounts, iSeqs + '.bak', iSeqs)
amptklib.log.info('{:,} ASVs validated ({:,} dropped)'.format(
numKept, numDropped))
amptklib.SafeRemove(iSeqs + '.bak')
#map reads to DADA2 OTUs
amptklib.log.info("Mapping reads to DADA2 ASVs")
cmd = [
'vsearch', '--usearch_global', demuxtmp, '--db', iSeqs, '--id', '0.97',
'--uc', dadademux, '--strand', 'plus', '--otutabout', chimeraFreeTable,
'--threads', CORES
]
amptklib.runSubprocess(cmd, amptklib.log)
total = amptklib.line_count2(dadademux)
amptklib.log.info('{0:,}'.format(total) + ' reads mapped to ASVs ' +
'({0:.0f}%)'.format(total / float(orig_total) * 100))
#cluster
amptklib.log.info("Clustering ASVs at %s%% to generate biological OTUs" %
args.pct_otu)
radius = float(args.pct_otu) / 100.
cmd = [
'vsearch', '--cluster_smallmem', iSeqs, '--centroids', bioSeqs, '--id',
str(radius), '--strand', 'plus', '--relabel', 'OTU', '--qmask', 'none',
'--usersort', '--threads', CORES
]
amptklib.runSubprocess(cmd, amptklib.log)
total = amptklib.countfasta(bioSeqs)
amptklib.log.info('{0:,}'.format(total) + ' OTUs generated')
#determine where iSeqs clustered
iSeqmap = base + '.ASV_map.uc'
cmd = [
'vsearch', '--usearch_global', iSeqs, '--db', bioSeqs, '--id',
str(radius), '--uc', iSeqmap, '--strand', 'plus', '--threads', CORES
]
amptklib.runSubprocess(cmd, amptklib.log)
iSeqMapped = {}
with open(iSeqmap, 'r') as mapping:
for line in mapping:
line = line.replace('\n', '')
cols = line.split('\t')
OTU = cols[9]
Hit = cols[8]
if not OTU in iSeqMapped:
iSeqMapped[OTU] = [Hit]
else:
iSeqMapped[OTU].append(Hit)
with open(ClusterComp, 'w') as clusters:
clusters.write('OTU\tASVs\n')
for k, v in natsorted(list(iSeqMapped.items())):
clusters.write('%s\t%s\n' % (k, ', '.join(v)))
#create OTU table
amptklib.log.info("Mapping reads to OTUs")
cmd = [
'vsearch', '--usearch_global', demuxtmp, '--db', bioSeqs, '--id',
'0.97', '--uc', uctmp, '--strand', 'plus', '--otutabout', bioTable,
'--threads', CORES
]
amptklib.runSubprocess(cmd, amptklib.log)
total = amptklib.line_count2(uctmp)
amptklib.log.info('{0:,}'.format(total) + ' reads mapped to OTUs ' +
'({0:.0f}%)'.format(total / float(orig_total) * 100))
if not args.debug:
amptklib.removefile(no_ns)
shutil.rmtree(filtfolder)
amptklib.removefile(dada2out)
amptklib.removefile(derep)
amptklib.removefile(demuxtmp)
amptklib.removefile(uctmp)
amptklib.removefile(iSeqmap)
amptklib.removefile(dadademux)
#Print location of files to STDOUT
print("-------------------------------------------------------")
print("DADA2 Script has Finished Successfully")
print("-------------------------------------------------------")
if args.debug:
print("Tmp Folder of files: %s" % filtfolder)
print("Amplicon sequence variants: %s" % iSeqs)
print("ASV OTU Table: %s" % chimeraFreeTable)
print("Clustered OTUs: %s" % bioSeqs)
print("OTU Table: %s" % bioTable)
print("ASVs 2 OTUs: %s" % ClusterComp)
print("-------------------------------------------------------")
otu_print = bioSeqs.split('/')[-1]
tab_print = bioTable.split('/')[-1]
if 'darwin' in sys.platform:
print(colr.WARN + "\nExample of next cmd:" + colr.END +
" amptk filter -i %s -f %s -b <mock barcode>\n" %
(tab_print, otu_print))
else:
print(
"\nExample of next cmd: amptk filter -i %s -f %s -b <mock barcode>\n"
% (tab_print, otu_print))
def main(args):
parser = argparse.ArgumentParser(
prog='amptk-OTU_cluster.py',
usage="%(prog)s [options] -i file.demux.fq\n%(prog)s -h for help menu",
description='''Script runs UPARSE OTU clustering.
Requires USEARCH by Robert C. Edgar: http://drive5.com/usearch''',
epilog="""Written by Jon Palmer (2015) [email protected]""",
formatter_class=MyFormatter)
parser.add_argument('-i',
'--fastq',
dest="FASTQ",
required=True,
help='FASTQ file (Required)')
parser.add_argument('-o', '--out', help='Base output name')
parser.add_argument('-e',
'--maxee',
default='1.0',
help='Quality trim EE value')
parser.add_argument('-p',
'--pct_otu',
default='97',
help="OTU Clustering Percent")
parser.add_argument('-m',
'--minsize',
default='2',
help='Min size to keep for clustering')
parser.add_argument('-u',
'--usearch',
dest="usearch",
default='usearch9',
help='USEARCH9 EXE')
parser.add_argument('--uchime_ref',
help='Run UCHIME REF [ITS,16S,LSU,COI,custom]')
parser.add_argument('--map_filtered',
action='store_true',
help='map quality filtered reads back to OTUs')
parser.add_argument('--unoise',
action='store_true',
help='Run De-noising (UNOISE)')
parser.add_argument('--debug',
action='store_true',
help='Remove Intermediate Files')
parser.add_argument('--cpus',
type=int,
help="Number of CPUs. Default: auto")
args = parser.parse_args(args)
parentdir = os.path.join(os.path.dirname(amptklib.__file__))
#get basename if not args.out passed
if args.out:
base = args.out
else:
if 'demux' in args.FASTQ:
base = os.path.basename(args.FASTQ).split('.demux')[0]
else:
base = os.path.basename(args.FASTQ).split('.f')[0]
#remove logfile if exists
log_name = base + '.amptk-cluster.log'
if os.path.isfile(log_name):
os.remove(log_name)
amptklib.setupLogging(log_name)
FNULL = open(os.devnull, 'w')
cmd_args = " ".join(sys.argv) + '\n'
amptklib.log.debug(cmd_args)
print("-------------------------------------------------------")
#initialize script, log system info and usearch version
amptklib.SystemInfo()
#Do a version check
usearch = args.usearch
amptklib.versionDependencyChecks(usearch)
#get number of cpus
if args.cpus:
cpus = args.cpus
else:
cpus = amptklib.getCPUS()
#make tmp folder
tmp = base + '_tmp'
if not os.path.exists(tmp):
os.makedirs(tmp)
#Count FASTQ records
amptklib.log.info("Loading FASTQ Records")
#convert to FASTA for mapping
orig_fasta = os.path.join(tmp, base + '.orig.fa')
cmd = [
'vsearch', '--fastq_filter', args.FASTQ, '--fastaout', orig_fasta,
'--fastq_qmax', '55', '--threads',
str(cpus)
]
amptklib.runSubprocess(cmd, amptklib.log)
orig_total = amptklib.countfasta(orig_fasta)
size = amptklib.checkfastqsize(args.FASTQ)
readablesize = amptklib.convertSize(size)
amptklib.log.info('{0:,}'.format(orig_total) + ' reads (' + readablesize +
')')
#Expected Errors filtering step
filter_out = os.path.join(tmp, base + '.EE' + args.maxee + '.filter.fq')
filter_fasta = os.path.join(tmp, base + '.EE' + args.maxee + '.filter.fa')
amptklib.log.info("Quality Filtering, expected errors < %s" % args.maxee)
cmd = [
'vsearch', '--fastq_filter', args.FASTQ, '--fastq_maxee',
str(args.maxee), '--fastqout', filter_out, '--fastaout', filter_fasta,
'--fastq_qmax', '55', '--threads',
str(cpus)
]
amptklib.runSubprocess(cmd, amptklib.log)
total = amptklib.countfastq(filter_out)
amptklib.log.info('{0:,}'.format(total) + ' reads passed')
#now run full length dereplication
derep_out = os.path.join(tmp, base + '.EE' + args.maxee + '.derep.fa')
amptklib.log.info("De-replication (remove duplicate reads)")
cmd = [
'vsearch', '--derep_fulllength', filter_fasta, '--sizeout', '--output',
derep_out, '--threads',
str(cpus)
]
amptklib.runSubprocess(cmd, amptklib.log)
total = amptklib.countfasta(derep_out)
amptklib.log.info('{0:,}'.format(total) + ' reads passed')
#optional run UNOISE
if args.unoise:
unoise_out = unoise_out = os.path.join(
tmp, base + '.EE' + args.maxee + '.denoised.fa')
amptklib.log.info("Denoising Data with UNOISE")
cmd = [
usearch, '-cluster_fast', derep_out, '-centroids', unoise_out,
'-id', '0.9', '--maxdiffs', '5', '-abskew', '10', '-sizein',
'-sizeout', '-sort', 'size', '-threads',
str(cpus)
]
amptklib.runSubprocess(cmd, amptklib.log)
total = amptklib.countfasta(unoise_out)
amptklib.log.info('{0:,}'.format(total) + ' reads passed')
else:
unoise_out = derep_out
#now sort by size remove singletons
sort_out = os.path.join(tmp, base + '.EE' + args.maxee + '.sort.fa')
cmd = [
'vsearch', '--sortbysize', unoise_out, '--minsize', args.minsize,
'--output', sort_out, '--threads',
str(cpus)
]
amptklib.runSubprocess(cmd, amptklib.log)
#now run clustering algorithm
radius = str(100 - int(args.pct_otu))
otu_out = os.path.join(tmp, base + '.EE' + args.maxee + '.otus.fa')
amptklib.log.info("Clustering OTUs (UPARSE)")
cmd = [
usearch, '-cluster_otus', sort_out, '-relabel', 'OTU',
'-otu_radius_pct', radius, '-otus', otu_out, '-threads',
str(cpus)
]
amptklib.runSubprocess(cmd, amptklib.log)
numOTUs = amptklib.countfasta(otu_out)
amptklib.log.info('{0:,}'.format(numOTUs) + ' OTUs')
#clean up padded N's
amptklib.log.info("Cleaning up padding from OTUs")
otu_clean = os.path.join(tmp, base + '.EE' + args.maxee + '.clean.otus.fa')
amptklib.fasta_strip_padding(otu_out, otu_clean)
#optional UCHIME Ref
if not args.uchime_ref:
uchime_out = otu_clean
else:
uchime_out = os.path.join(
tmp, base + '.EE' + args.maxee + '.uchime.otus.fa')
#check if file is present, remove from previous run if it is.
if os.path.isfile(uchime_out):
os.remove(uchime_out)
#R. Edgar now says using largest DB is better for UCHIME, so use the one distributed with taxonomy
if args.uchime_ref in [
'ITS', '16S', 'LSU', 'COI'
]: #test if it is one that is setup, otherwise default to full path
uchime_db = os.path.join(parentdir, 'DB', args.uchime_ref + '.udb')
if not os.path.isfile(uchime_db):
amptklib.log.error(
"Database not properly configured, run `amptk install` to setup DB, skipping chimera filtering"
)
uchime_out = otu_clean
#since uchime cannot work with udb database, need to extract fasta sequences, do this if
if not amptklib.checkfile(
os.path.join(parentdir, 'DB',
args.uchime_ref + '.extracted.fa')):
uchime_db = os.path.join(parentdir, 'DB',
args.uchime_ref + '.extracted.fa')
cmd = [
'vsearch', '--udb2fasta',
os.path.join(parentdir, 'DB', args.uchime_ref + '.udb'),
'--output', uchime_db
]
amptklib.runSubprocess(cmd, amptklib.log)
else:
uchime_db = os.path.join(parentdir, 'DB',
args.uchime_ref + '.extracted.fa')
else:
if os.path.isfile(args.uchime_ref):
uchime_db = os.path.abspath(args.uchime_ref)
else:
amptklib.log.error(
"%s is not a valid file, skipping reference chimera filtering"
% args.uchime_ref)
uchime_out = otu_clean
#now run chimera filtering if all checks out
if not os.path.isfile(uchime_out):
amptklib.log.info("Chimera Filtering (VSEARCH) using %s DB" %
args.uchime_ref)
cmd = [
'vsearch', '--mindiv', '1.0', '--uchime_ref', otu_clean,
'--db', uchime_db, '--nonchimeras', uchime_out, '--threads',
str(cpus)
]
amptklib.runSubprocess(cmd, amptklib.log)
total = amptklib.countfasta(uchime_out)
uchime_chimeras = numOTUs - total
amptklib.log.info('{0:,}'.format(total) + ' OTUs passed, ' +
'{0:,}'.format(uchime_chimeras) +
' ref chimeras')
#Filter out OTUs in wrong orientation
amptklib.log.info('Validating OTU orientation')
passingOTUs = os.path.join(tmp, base + '.passed.otus.fa')
numKept, numDropped = amptklib.validateorientation(tmp, sort_out,
uchime_out, passingOTUs)
amptklib.log.info('{:,} OTUs validated ({:,} dropped)'.format(
numKept, numDropped))
#now map reads back to OTUs and build OTU table
uc_out = os.path.join(tmp, base + '.EE' + args.maxee + '.mapping.uc')
otu_table = os.path.join(tmp, base + '.EE' + args.maxee + '.otu_table.txt')
#setup reads to map
if args.map_filtered:
reads = filter_fasta
else:
reads = orig_fasta
amptklib.log.info("Mapping Reads to OTUs and Building OTU table")
cmd = [
'vsearch', '--usearch_global', reads, '--strand', 'plus', '--id',
'0.97', '--db', passingOTUs, '--uc', uc_out, '--otutabout', otu_table,
'--threads',
str(cpus)
]
amptklib.runSubprocess(cmd, amptklib.log)
#count reads mapped
total = amptklib.line_count2(uc_out)
amptklib.log.info('{0:,}'.format(total) + ' reads mapped to OTUs ' +
'({0:.0f}%)'.format(total / float(orig_total) * 100))
#Move files around, delete tmp if argument passed.
currentdir = os.getcwd()
final_otu = os.path.join(currentdir, base + '.cluster.otus.fa')
shutil.copyfile(passingOTUs, final_otu)
final_otu_table = os.path.join(currentdir, base + '.otu_table.txt')
shutil.copyfile(otu_table, final_otu_table)
if not args.debug:
shutil.rmtree(tmp)
#Print location of files to STDOUT
print("-------------------------------------------------------")
print("OTU Clustering Script has Finished Successfully")
print("-------------------------------------------------------")
if not not args.debug:
print("Tmp Folder of files: %s" % tmp)
print("Clustered OTUs: %s" % os.path.basename(final_otu))
print("OTU Table: %s" % os.path.basename(final_otu_table))
print("-------------------------------------------------------")
otu_print = final_otu.split('/')[-1]
tab_print = final_otu_table.split('/')[-1]
if 'darwin' in sys.platform:
print(colr.WARN + "\nExample of next cmd:" + colr.END +
" amptk filter -i %s -f %s -b <mock barcode>\n" %
(tab_print, otu_print))
else:
print(
"\nExample of next cmd: amptk filter -i %s -f %s -b <mock barcode>\n"
% (tab_print, otu_print))
def main(args):
global FwdPrimer, RevPrimer, Barcodes, tmpdir, usearch
parser = argparse.ArgumentParser(
prog='amptk-process_illumina_raw.py',
usage="%(prog)s [options] -i file.fastq\n%(prog)s -h for help menu",
description=
'''Script finds barcodes, strips forward and reverse primers, relabels, and then trim/pads reads to a set length''',
epilog="""Written by Jon Palmer (2015) [email protected]""",
formatter_class=MyFormatter)
parser.add_argument('-f',
'--forward',
dest='fastq',
required=True,
help='Illumina FASTQ R1 reads')
parser.add_argument('-r',
'--reverse',
required=True,
help='Illumina FASTQ R2 reads')
parser.add_argument('-i',
'--index',
nargs='+',
required=True,
help='Illumina FASTQ index reads')
parser.add_argument('-m', '--mapping_file', help='QIIME-like mapping file')
parser.add_argument('--read_length',
type=int,
help='Read length, i.e. 2 x 300 bp = 300')
parser.add_argument('-o',
'--out',
dest="out",
default='illumina_out',
help='Base name for output')
parser.add_argument('--fwd_primer',
dest="F_primer",
default='515FB',
help='Forward Primer')
parser.add_argument('--rev_primer',
dest="R_primer",
default='806RB',
help='Reverse Primer')
parser.add_argument('--primer_mismatch',
default=2,
type=int,
help='Number of mis-matches in primer')
parser.add_argument('--barcode_mismatch',
default=0,
type=int,
help='Number of mis-matches in barcode')
parser.add_argument(
'--barcode_fasta',
help='FASTA file containing Barcodes (Names & Sequences)')
parser.add_argument('--rescue_forward',
default='on',
choices=['on', 'off'],
help='Rescue Not-merged forward reads')
parser.add_argument('--barcode_rev_comp',
action='store_true',
help='Reverse complement barcode sequences')
parser.add_argument('--min_len',
default=100,
type=int,
help='Minimum read length to keep')
parser.add_argument('-l',
'--trim_len',
default=300,
type=int,
help='Trim length for reads')
parser.add_argument('-p',
'--pad',
default='off',
choices=['on', 'off'],
help='Pad with Ns to a set length')
parser.add_argument('--cpus',
type=int,
help="Number of CPUs. Default: auto")
parser.add_argument('-u',
'--usearch',
dest="usearch",
default='usearch9',
help='USEARCH9 EXE')
parser.add_argument('--cleanup',
action='store_true',
help='remove intermediate files')
parser.add_argument('--merge_method',
default='usearch',
choices=['usearch', 'vsearch'],
help='Software to use for PE read merging')
args = parser.parse_args(args)
args.out = re.sub(r'\W+', '', args.out)
log_name = args.out + '.amptk-demux.log'
if os.path.isfile(log_name):
os.remove(log_name)
amptklib.setupLogging(log_name)
FNULL = open(os.devnull, 'w')
cmd_args = " ".join(sys.argv) + '\n'
amptklib.log.debug(cmd_args)
print("-------------------------------------------------------")
#initialize script, log system info and usearch version
amptklib.SystemInfo()
#get version of amptk
usearch = args.usearch
amptklib.versionDependencyChecks(usearch)
#get number of CPUs to use
if not args.cpus:
cpus = multiprocessing.cpu_count()
else:
cpus = args.cpus
#create tmpdir
tmpdir = args.out.split('.')[0] + '_' + str(os.getpid())
if not os.path.exists(tmpdir):
os.makedirs(tmpdir)
#parse a mapping file or a barcode fasta file, primers, etc get setup
#dealing with Barcodes, get ion barcodes or parse the barcode_fasta argument
barcode_file = args.out + ".barcodes_used.fa"
if os.path.isfile(barcode_file):
os.remove(barcode_file)
#check if mapping file passed, use this if present, otherwise use command line arguments
SampleData = {}
Barcodes = {}
RevBarcodes = {}
FwdPrimer = ''
RevPrimer = ''
if args.mapping_file:
if not os.path.isfile(args.mapping_file):
amptklib.log.error("Mapping file not found: %s" %
args.mapping_file)
sys.exit(1)
SampleData, Barcodes, RevBarcodes, FwdPrimer, RevPrimer = amptklib.parseMappingFileNEW(
args.mapping_file)
else: #no mapping file, so create dictionaries from barcode fasta files
if not args.barcode_fasta:
amptklib.log.error(
"You did not specify a --barcode_fasta or --mapping_file, one is required"
)
sys.exit(1)
else:
shutil.copyfile(args.barcode_fasta, barcode_file)
Barcodes = amptklib.fasta2barcodes(barcode_file, False)
if FwdPrimer == '' or RevPrimer == '':
#parse primers here so doesn't conflict with mapping primers
#look up primer db otherwise default to entry
if args.F_primer in amptklib.primer_db:
FwdPrimer = amptklib.primer_db.get(args.F_primer)
amptklib.log.info(
"{:} fwd primer found in AMPtk primer db, setting to: {:}".
format(args.F_primer, FwdPrimer))
else:
FwdPrimer = args.F_primer
amptklib.log.info(
"{:} fwd primer not found in AMPtk primer db, assuming it is actual primer sequence."
.format(args.F_primer))
if args.R_primer in amptklib.primer_db:
RevPrimer = amptklib.primer_db.get(args.R_primer)
amptklib.log.info(
"{:} rev primer found in AMPtk primer db, setting to: {:}".
format(args.R_primer, RevPrimer))
else:
RevPrimer = args.R_primer
amptklib.log.info(
"{:} rev primer not found in AMPtk primer db, assuming it is actual primer sequence."
.format(args.R_primer))
#if still no primers set, then exit
if FwdPrimer == '' or RevPrimer == '':
amptklib.log.error(
"Please provide primer sequences via --fwd_primer and --rev_primer"
)
sys.exit(1)
#if barcodes_rev_comp passed then reverse complement the keys in mapdict
if args.barcode_rev_comp:
amptklib.log.info("Reverse complementing barcode sequences")
backupDict = Barcodes
Barcodes = {}
for k, v in list(backupDict.items()):
RCkey = amptklib.RevComp(v)
Barcodes[k] = RCkey
amptklib.log.info("Loading %i samples from mapping file" % len(Barcodes))
amptklib.log.info('FwdPrimer: {:} RevPrimer: {:}'.format(
FwdPrimer, RevPrimer))
amptklib.log.info(
'Dropping reads less than {:} bp and setting lossless trimming to {:} bp.'
.format(args.min_len, args.trim_len))
#rename reads according to indexes
if not amptklib.PEandIndexCheck(
args.fastq, args.reverse,
args.index[0]): #check they are all same length
amptklib.log.error("FASTQ input malformed, read numbers do not match")
sys.exit(1)
amptklib.log.info("Loading FASTQ Records")
NumSeqs = amptklib.countfastq(args.fastq)
if cpus > 1:
amptklib.log.info("Splitting FASTQ files over {:} cpus".format(cpus))
amptklib.split_fastqPEandI(args.fastq, args.reverse, args.index[0],
NumSeqs, tmpdir, cpus * 2)
file_list = []
for file in os.listdir(tmpdir):
if file.endswith('.fq'):
filepart = os.path.join(tmpdir, file.split('_R')[0])
if not filepart in file_list:
file_list.append(filepart)
amptklib.log.info("Mapping indexes to reads and renaming PE reads")
amptklib.runMultiProgress(safe_run, file_list, cpus, args=args)
else:
amptklib.log.info("Mapping indexes to reads and renaming PE reads")
shutil.copyfile(args.fastq, os.path.join(tmpdir, 'chunk_R1.fq'))
shutil.copyfile(args.reverse, os.path.join(tmpdir, 'chunk_R2.fq'))
shutil.copyfile(args.index[0], os.path.join(tmpdir, 'chunk_R3.fq'))
processReadsPE(os.path.join(tmpdir, 'chunk'), args=args)
print("-------------------------------------------------------")
#Now concatenate all of the demuxed files together
amptklib.log.info("Concatenating Demuxed Files")
tmpDemux = os.path.join(tmpdir, args.out + '.demux.fq')
with open(tmpDemux, 'wb') as outfile:
for filename in glob.glob(os.path.join(tmpdir, '*.demux.fq')):
if filename == tmpDemux:
continue
with open(filename, 'r') as readfile:
shutil.copyfileobj(readfile, outfile)
#parse the stats
finalstats = [0, 0, 0, 0, 0, 0]
for file in os.listdir(tmpdir):
if file.endswith('.stats'):
with open(os.path.join(tmpdir, file), 'r') as statsfile:
line = statsfile.readline()
line = line.replace('\n', '')
newstats = line.split(',')
newstats = [int(i) for i in newstats]
for x, num in enumerate(newstats):
finalstats[x] += num
#finally reindex output
#last thing is to re-number of reads as it is possible they could have same name from multitprocessor split
Demux = args.out + '.demux.fq'
amptklib.fastqreindex(tmpDemux, Demux)
amptklib.SafeRemove(tmpDemux)
#output stats of the run
amptklib.log.info('{0:,}'.format(finalstats[0]) + ' total reads')
amptklib.log.info('{0:,}'.format(finalstats[0] - finalstats[1]) +
' discarded no index match')
amptklib.log.info('{0:,}'.format(finalstats[2]) +
' Fwd Primer found, {0:,}'.format(finalstats[3]) +
' Rev Primer found')
amptklib.log.info('{0:,}'.format(finalstats[4]) +
' discarded too short (< %i bp)' % args.min_len)
amptklib.log.info('{0:,}'.format(finalstats[5]) + ' valid output reads')
#now loop through data and find barcoded samples, counting each.....
BarcodeCount = {}
with open(Demux, 'r') as input:
header = itertools.islice(input, 0, None, 4)
for line in header:
ID = line.split("=", 1)[-1].split(";")[0]
if ID not in BarcodeCount:
BarcodeCount[ID] = 1
else:
BarcodeCount[ID] += 1
#now let's count the barcodes found and count the number of times they are found.
barcode_counts = "%30s: %s" % ('Sample', 'Count')
for k, v in natsorted(list(BarcodeCount.items()),
key=lambda k_v: k_v[1],
reverse=True):
barcode_counts += "\n%30s: %s" % (k, str(BarcodeCount[k]))
amptklib.log.info("Found %i barcoded samples\n%s" %
(len(BarcodeCount), barcode_counts))
#create mapping file if one doesn't exist
genericmapfile = args.out + '.mapping_file.txt'
amptklib.CreateGenericMappingFile(Barcodes, {}, FwdPrimer, RevPrimer,
genericmapfile, BarcodeCount)
#compress the output to save space
FinalDemux = Demux + '.gz'
amptklib.Fzip(Demux, FinalDemux, cpus)
amptklib.removefile(Demux)
if args.cleanup:
amptklib.SafeRemove(tmpdir)
#get file size
filesize = os.path.getsize(FinalDemux)
readablesize = amptklib.convertSize(filesize)
amptklib.log.info("Output file: %s (%s)" % (FinalDemux, readablesize))
amptklib.log.info("Mapping file: %s" % genericmapfile)
print("-------------------------------------------------------")
if 'darwin' in sys.platform:
print(col.WARN + "\nExample of next cmd: " + col.END +
"amptk cluster -i %s -o out\n" % (FinalDemux))
else:
print("\nExample of next cmd: amptk cluster -i %s -o out\n" %
(FinalDemux))
def main(args):
global FwdPrimer, RevPrimer, Barcodes, tmpdir
parser = argparse.ArgumentParser(
prog='amptk-process_ion.py',
usage="%(prog)s [options] -i file.fastq\n%(prog)s -h for help menu",
description=
'''Script finds barcodes, strips forward and reverse primers, relabels, and then trim/pads reads to a set length''',
epilog="""Written by Jon Palmer (2015) [email protected]""",
formatter_class=MyFormatter)
parser.add_argument('-i',
'--fastq',
'--sff',
'--fasta',
'--bam',
dest='fastq',
required=True,
help='BAM/FASTQ/SFF/FASTA file')
parser.add_argument('-q', '--qual', help='QUAL file (if -i is FASTA)')
parser.add_argument('-o',
'--out',
dest="out",
default='ion',
help='Base name for output')
parser.add_argument('-f',
'--fwd_primer',
dest="F_primer",
default='fITS7-ion',
help='Forward Primer')
parser.add_argument('-r',
'--rev_primer',
dest="R_primer",
default='ITS4',
help='Reverse Primer')
parser.add_argument(
'-m',
'--mapping_file',
help='Mapping file: QIIME format can have extra meta data columns')
parser.add_argument('-p',
'--pad',
default='off',
choices=['on', 'off'],
help='Pad with Ns to a set length')
parser.add_argument('--primer_mismatch',
default=2,
type=int,
help='Number of mis-matches in primer')
parser.add_argument('--barcode_mismatch',
default=0,
type=int,
help='Number of mis-matches in barcode')
parser.add_argument(
'--barcode_fasta',
default='ionxpress',
help='FASTA file containing Barcodes (Names & Sequences)')
parser.add_argument('--reverse_barcode',
help='FASTA file containing 3 prime Barocdes')
parser.add_argument('-b',
'--list_barcodes',
dest="barcodes",
default='all',
help='Enter Barcodes used separated by commas')
parser.add_argument('--min_len',
default=100,
type=int,
help='Minimum read length to keep')
parser.add_argument('-l',
'--trim_len',
default=300,
type=int,
help='Trim length for reads')
parser.add_argument(
'--full_length',
action='store_true',
help='Keep only full length reads (no trimming/padding)')
parser.add_argument('--mult_samples',
dest="multi",
default='False',
help='Combine multiple samples (i.e. FACE1)')
parser.add_argument('--ion',
action='store_true',
help='Input data is Ion Torrent')
parser.add_argument('--454', action='store_true', help='Input data is 454')
parser.add_argument('--cpus',
type=int,
help="Number of CPUs. Default: auto")
parser.add_argument('-u',
'--usearch',
dest="usearch",
default='usearch9',
help='USEARCH EXE')
args = parser.parse_args(args)
args.out = re.sub(r'\W+', '', args.out)
log_name = args.out + '.amptk-demux.log'
if os.path.isfile(log_name):
os.remove(log_name)
FNULL = open(os.devnull, 'w')
amptklib.setupLogging(log_name)
cmd_args = " ".join(sys.argv) + '\n'
amptklib.log.debug(cmd_args)
print("-------------------------------------------------------")
#initialize script, log system info and usearch version
amptklib.SystemInfo()
#Do a version check
usearch = args.usearch
amptklib.versionDependencyChecks(usearch)
#get number of CPUs to use
if not args.cpus:
cpus = multiprocessing.cpu_count()
else:
cpus = args.cpus
#parse a mapping file or a barcode fasta file, primers, etc get setup
#dealing with Barcodes, get ion barcodes or parse the barcode_fasta argument
barcode_file = args.out + ".barcodes_used.fa"
rev_barcode_file = args.out + '.revbarcodes_used.fa'
amptklib.SafeRemove(barcode_file)
amptklib.SafeRemove(rev_barcode_file)
#check if mapping file passed, use this if present, otherwise use command line arguments
SampleData = {}
Barcodes = {}
RevBarcodes = {}
if args.mapping_file:
if not os.path.isfile(args.mapping_file):
amptklib.log.error("Mapping file not found: %s" %
args.mapping_file)
sys.exit(1)
SampleData, Barcodes, RevBarcodes, FwdPrimer, RevPrimer = amptklib.parseMappingFileNEW(
args.mapping_file)
genericmapfile = args.mapping_file
else: #no mapping file, so create dictionaries from barcode fasta files
if args.barcode_fasta == 'ionxpress':
#get script path and barcode file name
pgm_barcodes = os.path.join(os.path.dirname(amptklib.__file__),
'DB', 'ionxpress_barcodes.fa')
elif args.barcode_fasta == 'ioncode':
pgm_barcodes = os.path.join(os.path.dirname(amptklib.__file__),
'DB', 'ioncode_barcodes.fa')
if args.barcode_fasta == 'ionxpress' or args.barcode_fasta == 'ioncode':
if args.barcodes == "all":
if args.multi == 'False':
shutil.copyfile(pgm_barcodes, barcode_file)
else:
with open(barcode_file, 'w') as barcodeout:
with open(pgm_barcodes, 'r') as input:
for rec in SeqIO.parse(input, 'fasta'):
outname = args.multi + '.' + rec.id
barcodeout.write(">%s\n%s\n" %
(outname, rec.seq))
else:
bc_list = args.barcodes.split(",")
inputSeqFile = open(pgm_barcodes, "rU")
SeqRecords = SeqIO.to_dict(SeqIO.parse(inputSeqFile, "fasta"))
for rec in bc_list:
name = "BC." + rec
seq = SeqRecords[name].seq
if args.multi != 'False':
outname = args.multi + '.' + name
else:
outname = name
outputSeqFile = open(barcode_file, "a")
outputSeqFile.write(">%s\n%s\n" % (outname, seq))
outputSeqFile.close()
inputSeqFile.close()
else:
#check for multi_samples and add if necessary
if args.multi == 'False':
shutil.copyfile(args.barcode_fasta, barcode_file)
if args.reverse_barcode:
shutil.copyfile(args.reverse_barcode, rev_barcode_file)
else:
with open(barcode_file, 'w') as barcodeout:
with open(args.barcode_fasta, 'r') as input:
for rec in SeqIO.parse(input, 'fasta'):
outname = args.multi + '.' + rec.id
barcodeout.write(">%s\n%s\n" % (outname, rec.seq))
if args.reverse_barcode:
with open(rev_barcode_file, 'w') as barcodeout:
with open(args.reverse_barcode, 'r') as input:
for rec in SeqIO.parse(input, 'fasta'):
outname = args.multi + '.' + rec.id
barcodeout.write(">%s\n%s\n" %
(outname, rec.seq))
#parse primers here so doesn't conflict with mapping primers
#look up primer db otherwise default to entry
if args.F_primer in amptklib.primer_db:
FwdPrimer = amptklib.primer_db.get(args.F_primer)
amptklib.log.info(
"{:} fwd primer found in AMPtk primer db, setting to: {:}".
format(args.F_primer, FwdPrimer))
else:
FwdPrimer = args.F_primer
amptklib.log.info(
"{:} fwd primer not found in AMPtk primer db, assuming it is actual primer sequence."
.format(args.F_primer))
if args.R_primer in amptklib.primer_db:
RevPrimer = amptklib.primer_db.get(args.R_primer)
amptklib.log.info(
"{:} rev primer found in AMPtk primer db, setting to: {:}".
format(args.R_primer, RevPrimer))
else:
RevPrimer = args.R_primer
amptklib.log.info(
"{:} rev primer not found in AMPtk primer db, assuming it is actual primer sequence."
.format(args.R_primer))
#check if input is compressed
gzip_list = []
if args.fastq.endswith('.gz'):
gzip_list.append(os.path.abspath(args.fastq))
if gzip_list:
amptklib.log.info("Gzipped input files detected, uncompressing")
for file in gzip_list:
file_out = file.replace('.gz', '')
amptklib.Funzip(file, file_out, cpus)
args.fastq = args.fastq.replace('.gz', '')
#if SFF file passed, convert to FASTQ with biopython
if args.fastq.endswith(".sff"):
if args.barcode_fasta == 'ionxpress':
if not args.mapping_file:
amptklib.log.error(
"You did not specify a --barcode_fasta or --mapping_file, one is required for 454 data"
)
sys.exit(1)
amptklib.log.info("SFF input detected, converting to FASTQ")
SeqIn = args.out + '.sff.extract.fastq'
SeqIO.convert(args.fastq, "sff-trim", SeqIn, "fastq")
elif args.fastq.endswith(".fas") or args.fastq.endswith(
".fasta") or args.fastq.endswith(".fa"):
if not args.qual:
amptklib.log.error(
"FASTA input detected, however no QUAL file was given. You must have FASTA + QUAL files"
)
sys.exit(1)
else:
if args.barcode_fasta == 'ionxpress':
if not args.mapping_file:
amptklib.log.error(
"You did not specify a --barcode_fasta or --mapping_file, one is required for 454 data"
)
sys.exit(1)
SeqIn = args.out + '.fastq'
amptklib.log.info("FASTA + QUAL detected, converting to FASTQ")
amptklib.faqual2fastq(args.fastq, args.qual, SeqIn)
elif args.fastq.endswith('.bam'):
#so we can convert natively with pybam, however it is 10X slower than bedtools/samtools
#since samtools is fastest, lets use that if exists, if not then bedtools, else default to pybam
amptklib.log.info("Converting Ion Torrent BAM file to FASTQ")
SeqIn = args.out + '.fastq'
if amptklib.which('samtools'):
cmd = ['samtools', 'fastq', '-@', str(cpus), args.fastq]
amptklib.runSubprocess2(cmd, amptklib.log, SeqIn)
else:
if amptklib.which('bedtools'):
cmd = [
'bedtools', 'bamtofastq', '-i', args.fastq, '-fq', SeqIn
]
amptklib.runSubprocess(cmd, amptklib.log)
else: #default to pybam
amptklib.bam2fastq(args.fastq, SeqIn)
else:
SeqIn = args.fastq
#start here to process the reads, first reverse complement the reverse primer
catDemux = args.out + '.demux.fq'
origRevPrimer = RevPrimer
RevPrimer = amptklib.RevComp(RevPrimer)
amptklib.log.info("Foward primer: %s, Rev comp'd rev primer: %s" %
(FwdPrimer, RevPrimer))
#then setup barcode dictionary
if len(Barcodes) < 1:
Barcodes = amptklib.fasta2barcodes(barcode_file, False)
#setup for looking for reverse barcode
if len(RevBarcodes) < 1 and args.reverse_barcode:
if not os.path.isfile(args.reverse_barcode):
amptklib.log.info("Reverse barcode is not a valid file, exiting")
sys.exit(1)
shutil.copyfile(args.reverse_barcode, rev_barcode_file)
RevBarcodes = amptklib.fasta2barcodes(rev_barcode_file, True)
#Count FASTQ records
amptklib.log.info("Loading FASTQ Records")
orig_total = amptklib.countfastq(SeqIn)
size = amptklib.checkfastqsize(SeqIn)
readablesize = amptklib.convertSize(size)
amptklib.log.info('{0:,}'.format(orig_total) + ' reads (' + readablesize +
')')
#create tmpdir and split input into n cpus
tmpdir = args.out.split('.')[0] + '_' + str(os.getpid())
if not os.path.exists(tmpdir):
os.makedirs(tmpdir)
amptklib.log.info(
'Dropping reads less than {:} bp and setting lossless trimming to {:} bp.'
.format(args.min_len, args.trim_len))
if cpus > 1:
#split fastq file
amptklib.log.info("Splitting FASTQ files over {:} cpus".format(cpus))
amptklib.split_fastq(SeqIn, orig_total, tmpdir, cpus * 2)
#now get file list from tmp folder
file_list = []
for file in os.listdir(tmpdir):
if file.endswith(".fq"):
file = os.path.join(tmpdir, file)
file_list.append(file)
#finally process reads over number of cpus
amptklib.runMultiProgress(processRead, file_list, cpus, args=args)
else:
shutil.copyfile(SeqIn, os.path.join(tmpdir, 'chunk.fq'))
processRead(os.path.join(tmpdir, 'chunk.fq'), args=args)
print("-------------------------------------------------------")
#Now concatenate all of the demuxed files together
amptklib.log.info("Concatenating Demuxed Files")
tmpDemux = args.out + '.tmp.demux.fq'
with open(tmpDemux, 'w') as outfile:
for filename in glob.glob(os.path.join(tmpdir, '*.demux.fq')):
if filename == tmpDemux:
continue
with open(filename, 'r') as readfile:
shutil.copyfileobj(readfile, outfile)
#parse the stats
finalstats = [0, 0, 0, 0, 0, 0, 0]
for file in os.listdir(tmpdir):
if file.endswith('.stats'):
with open(os.path.join(tmpdir, file), 'r') as statsfile:
line = statsfile.readline()
line = line.rstrip()
newstats = line.split(',')
newstats = [int(i) for i in newstats]
for x, num in enumerate(newstats):
finalstats[x] += num
#clean up tmp folder
shutil.rmtree(tmpdir)
#last thing is to re-number of reads as it is possible they could have same name from multitprocessor split
amptklib.fastqreindex(tmpDemux, catDemux)
os.remove(tmpDemux)
amptklib.log.info('{0:,}'.format(finalstats[0]) + ' total reads')
if args.reverse_barcode:
amptklib.log.info('{0:,}'.format(finalstats[0] - finalstats[1] -
finalstats[2] - finalstats[4]) +
' valid Fwd and Rev Barcodes')
else:
amptklib.log.info('{0:,}'.format(finalstats[0] - finalstats[1]) +
' valid Barcode')
amptklib.log.info('{0:,}'.format(finalstats[0] - finalstats[1] -
finalstats[2]) +
' Fwd Primer found, {0:,}'.format(finalstats[3]) +
' Rev Primer found')
amptklib.log.info('{0:,}'.format(finalstats[5]) +
' discarded too short (< %i bp)' % args.min_len)
amptklib.log.info('{0:,}'.format(finalstats[6]) + ' valid output reads')
#now loop through data and find barcoded samples, counting each.....
BarcodeCount = {}
with open(catDemux, 'r') as input:
header = itertools.islice(input, 0, None, 4)
for line in header:
ID = line.split("=", 1)[-1].split(";")[0]
if ID not in BarcodeCount:
BarcodeCount[ID] = 1
else:
BarcodeCount[ID] += 1
#now let's count the barcodes found and count the number of times they are found.
barcode_counts = "%22s: %s" % ('Sample', 'Count')
for k, v in natsorted(list(BarcodeCount.items()),
key=lambda k_v: k_v[1],
reverse=True):
barcode_counts += "\n%22s: %s" % (k, str(BarcodeCount[k]))
amptklib.log.info("Found %i barcoded samples\n%s" %
(len(BarcodeCount), barcode_counts))
#create a generic mappingfile for downstream processes
genericmapfile = args.out + '.mapping_file.txt'
if not args.mapping_file:
amptklib.CreateGenericMappingFile(Barcodes, RevBarcodes, FwdPrimer,
origRevPrimer, genericmapfile,
BarcodeCount)
else:
amptklib.updateMappingFile(args.mapping_file, BarcodeCount,
genericmapfile)
#compress the output to save space
FinalDemux = catDemux + '.gz'
amptklib.Fzip(catDemux, FinalDemux, cpus)
amptklib.removefile(catDemux)
if gzip_list:
for file in gzip_list:
file = file.replace('.gz', '')
amptklib.removefile(file)
#get file size
filesize = os.path.getsize(FinalDemux)
readablesize = amptklib.convertSize(filesize)
amptklib.log.info("Output file: %s (%s)" % (FinalDemux, readablesize))
amptklib.log.info("Mapping file: %s" % genericmapfile)
print("-------------------------------------------------------")
if 'darwin' in sys.platform:
print(col.WARN + "\nExample of next cmd: " + col.END +
"amptk cluster -i %s -o out\n" % (FinalDemux))
else:
print("\nExample of next cmd: amptk cluster -i %s -o out\n" %
(FinalDemux))
def main(args):
parser = argparse.ArgumentParser(
prog='amptk-unoise2.py',
usage="%(prog)s [options] -i file.demux.fq\n%(prog)s -h for help menu",
description='''Script runs UNOISE2 algorithm.
Requires USEARCH9 by Robert C. Edgar: http://drive5.com/usearch''',
epilog="""Written by Jon Palmer (2016) [email protected]""",
formatter_class=MyFormatter)
parser.add_argument('-i',
'--fastq',
dest="FASTQ",
required=True,
help='FASTQ file (Required)')
parser.add_argument('-o', '--out', help='Base output name')
parser.add_argument('-e',
'--maxee',
default='1.0',
help='Quality trim EE value')
parser.add_argument('-m',
'--minsize',
default='8',
help='Min size to keep for denoising')
parser.add_argument('-u',
'--usearch',
dest="usearch",
default='usearch9',
help='USEARCH9 EXE')
parser.add_argument('-p',
'--pct_otu',
default='97',
help="Biological OTU Clustering Percent")
parser.add_argument('--uchime_ref',
help='Run UCHIME2 REF [ITS,16S,LSU,COI,custom]')
parser.add_argument('--map_filtered',
action='store_true',
help='map quality filtered reads back to OTUs')
parser.add_argument('--debug',
action='store_true',
help='Remove Intermediate Files')
parser.add_argument('--cpus',
type=int,
help="Number of CPUs. Default: auto")
args = parser.parse_args(args)
parentdir = os.path.join(os.path.dirname(amptklib.__file__))
#get basename if not args.out passed
if args.out:
base = args.out
else:
if 'demux' in args.FASTQ:
base = os.path.basename(args.FASTQ).split('.demux')[0]
else:
base = os.path.basename(args.FASTQ).split('.f')[0]
#remove logfile if exists
log_name = base + '.amptk-unoise2.log'
if os.path.isfile(log_name):
os.remove(log_name)
amptklib.setupLogging(log_name)
FNULL = open(os.devnull, 'w')
cmd_args = " ".join(sys.argv) + '\n'
amptklib.log.debug(cmd_args)
print("-------------------------------------------------------")
#initialize script, log system info and usearch version
amptklib.SystemInfo()
#Do a version check
usearch = args.usearch
amptklib.versionDependencyChecks(usearch)
#get number of cpus
if args.cpus:
cpus = args.cpus
else:
cpus = amptklib.getCPUS()
#make tmp folder
tmp = base + '_tmp'
if not os.path.exists(tmp):
os.makedirs(tmp)
#Count FASTQ records
amptklib.log.info("Loading FASTQ Records")
#convert to FASTA for mapping
orig_fasta = os.path.join(tmp, base + '.orig.fa')
cmd = [
'vsearch', '--fastq_filter', args.FASTQ, '--fastaout', orig_fasta,
'--fastq_qmax', '55', '--threads',
str(cpus)
]
amptklib.runSubprocess(cmd, amptklib.log)
orig_total = amptklib.countfasta(orig_fasta)
size = amptklib.checkfastqsize(args.FASTQ)
readablesize = amptklib.convertSize(size)
amptklib.log.info('{0:,}'.format(orig_total) + ' reads (' + readablesize +
')')
#Expected Errors filtering step
filter_out = os.path.join(tmp, base + '.EE' + args.maxee + '.filter.fq')
filter_fasta = os.path.join(tmp, base + '.EE' + args.maxee + '.filter.fa')
amptklib.log.info("Quality Filtering, expected errors < %s" % args.maxee)
cmd = [
'vsearch', '--fastq_filter', args.FASTQ, '--fastq_maxee',
str(args.maxee), '--fastqout', filter_out, '--fastaout', filter_fasta,
'--fastq_qmax', '55', '--threads',
str(cpus)
]
amptklib.runSubprocess(cmd, amptklib.log)
total = amptklib.countfastq(filter_out)
amptklib.log.info('{0:,}'.format(total) + ' reads passed')
#now run full length dereplication
derep_out = os.path.join(tmp, base + '.EE' + args.maxee + '.derep.fa')
amptklib.log.info("De-replication (remove duplicate reads)")
cmd = [
'vsearch', '--derep_fulllength', filter_out, '--relabel', 'Read_',
'--sizeout', '--output', derep_out, '--threads',
str(cpus)
]
amptklib.runSubprocess(cmd, amptklib.log)
total = amptklib.countfasta(derep_out)
amptklib.log.info('{0:,}'.format(total) + ' reads passed')
#now run de-noiser UNOISE2
amptklib.log.info("Denoising reads with UNOISE2")
unoise_out = os.path.join(tmp, base + '.EE' + args.maxee + '.unoise.fa')
cmd = [
usearch, '-unoise2', derep_out, '-fastaout', unoise_out, '-minampsize',
args.minsize, '-threads',
str(cpus)
]
amptklib.runSubprocess(cmd, amptklib.log)
total = amptklib.countfasta(unoise_out)
amptklib.log.info('{0:,}'.format(total) + ' denoised sequences')
#strip N's
amptklib.log.info("Cleaning up padding from OTUs")
otu_clean = os.path.join(tmp, base + '.EE' + args.maxee + '.clean.fa')
amptklib.fasta_strip_padding(unoise_out, otu_clean)
#run optional uchime_ref
if not args.uchime_ref:
uchime_out = otu_clean
else:
uchime_out = os.path.join(
tmp, base + '.EE' + args.maxee + '.uchime.otus.fa')
#R. Edgar now says using largest DB is better for UCHIME, so use the one distributed with taxonomy
if args.uchime_ref in [
'ITS', '16S', 'LSU', 'COI'
]: #test if it is one that is setup, otherwise default to full path
uchime_db = os.path.join(parentdir, 'DB', args.uchime_ref + '.udb')
if not os.path.isfile(uchime_db):
amptklib.log.error(
"Database not properly configured, run `amptk install` to setup DB, skipping chimera filtering"
)
uchime_out = otu_clean
#since uchime cannot work with udb database, need to extract fasta sequences, do this if
if not amptklib.checkfile(
os.path.join(parentdir, 'DB',
args.uchime_ref + '.extracted.fa')):
uchime_db = os.path.join(parentdir, 'DB',
args.uchime_ref + '.extracted.fa')
cmd = [
'vsearch', '--udb2fasta',
os.path.join(parentdir, 'DB', args.uchime_ref + '.udb'),
'--output', uchime_db
]
amptklib.runSubprocess(cmd, amptklib.log)
else:
uchime_db = os.path.join(parentdir, 'DB',
args.uchime_ref + '.extracted.fa')
else:
uchime_db = os.path.abspath(args.uchime_ref)
#now run chimera filtering if all checks out
if not os.path.isfile(uchime_out):
amptklib.log.info("Chimera Filtering (VSEARCH)")
cmd = [
'vsearch', '--mindiv', '1.0', '--uchime_ref', otu_clean,
'--db', uchime_db, '--nonchimeras', uchime_out, '--threads',
str(cpus)
]
amptklib.runSubprocess(cmd, amptklib.log)
total = amptklib.countfasta(uchime_out)
amptklib.log.info('{0:,}'.format(total) + ' OTUs passed')
#inferred sequences
iSeqs = base + '.ASVs.fa'
amptklib.fastarename(uchime_out, 'ASV', iSeqs)
#Filter out ASVs in wrong orientation
amptklib.log.info('Validating ASV orientation')
passingOTUs = os.path.join(tmp, base + '.passed.asvs.fa')
numKept, numDropped = amptklib.validateorientation(tmp, derep_out,
uchime_out, passingOTUs)
amptklib.log.info('{:,} ASVs validated ({:,} dropped)'.format(
numKept, numDropped))
#build OTU table with iSeqs
uc_iSeq_out = os.path.join(tmp, base + '.EE' + args.maxee + '.mapping.uc')
iSeq_otu_table = base + '.otu_table.txt'
#setup reads to map
if args.map_filtered:
reads = filter_fasta
else:
reads = orig_fasta
amptklib.log.info("Mapping Reads to ASVs and Building OTU table")
cmd = [
'vsearch', '--usearch_global', reads, '--strand', 'plus', '--id',
'0.97', '--db', passingOTUs, '--uc', uc_iSeq_out, '--otutabout',
iSeq_otu_table, '--threads',
str(cpus)
]
amptklib.runSubprocess(cmd, amptklib.log)
#count reads mapped
total = amptklib.line_count2(uc_iSeq_out)
amptklib.log.info('{0:,}'.format(total) + ' reads mapped to ASVs ' +
'({0:.0f}%)'.format(total / float(orig_total) * 100))
#now cluster to biological OTUs with UCLUST
radius = float(args.pct_otu) / 100.
amptklib.log.info(
"Clustering denoised sequences into biological OTUs at %s%%" %
args.pct_otu)
uclust_out = os.path.join(tmp, base + '.EE' + args.maxee + '.uclust.fa')
cmd = [
'vsearch', '--cluster_smallmem', passingOTUs, '--centroids',
uclust_out, '--id',
str(radius), '--strand', 'plus', '--relabel', 'OTU', '--qmask', 'none',
'--usersort', '--threads',
str(cpus)
]
amptklib.runSubprocess(cmd, amptklib.log)
total = amptklib.countfasta(uclust_out)
amptklib.log.info('{0:,}'.format(total) + ' OTUs generated')
#determine where denoised sequences clustered
ClusterComp = base + '.ASVs2clusters.txt'
iSeqmap = base + '.unoise_map.uc'
cmd = [
usearch, '-usearch_global', passingOTUs, '-db', uclust_out, '-id',
str(radius), '-uc', iSeqmap, '-strand', 'plus', '-threads',
str(cpus)
]
amptklib.runSubprocess(cmd, amptklib.log)
iSeqMapped = {}
with open(iSeqmap, 'r') as mapping:
for line in mapping:
line = line.replace('\n', '')
cols = line.split('\t')
OTU = cols[9]
Hit = cols[8]
if not OTU in iSeqMapped:
iSeqMapped[OTU] = [Hit]
else:
iSeqMapped[OTU].append(Hit)
with open(ClusterComp, 'w') as clusters:
clusters.write('OTU\tASVs\n')
for k, v in natsorted(list(iSeqMapped.items())):
clusters.write('%s\t%s\n' % (k, ', '.join(v)))
#now map reads back to OTUs and build OTU table
uc_out = os.path.join(tmp,
base + '.EE' + args.maxee + '.cluster.mapping.uc')
otu_table = os.path.join(
tmp, base + '.EE' + args.maxee + '.cluster.otu_table.txt')
#setup reads to map
if args.map_filtered:
reads = filter_fasta
else:
reads = orig_fasta
amptklib.log.info("Mapping Reads to OTUs and Building OTU table")
cmd = [
'vsearch', '--usearch_global', reads, '--strand', 'plus', '--id',
'0.97', '--db', uclust_out, '--uc', uc_out, '--otutabout', otu_table,
'--threads',
str(cpus)
]
amptklib.runSubprocess(cmd, amptklib.log)
#count reads mapped
total = amptklib.line_count2(uc_out)
amptklib.log.info('{0:,}'.format(total) + ' reads mapped to OTUs ' +
'({0:.0f}%)'.format(total / float(orig_total) * 100))
#Move files around, delete tmp if argument passed.
currentdir = os.getcwd()
final_otu = os.path.join(currentdir, base + '.cluster.otus.fa')
shutil.copyfile(uclust_out, final_otu)
final_otu_table = os.path.join(currentdir, base + '.cluster.otu_table.txt')
shutil.copyfile(otu_table, final_otu_table)
if not args.debug:
shutil.rmtree(tmp)
#Print location of files to STDOUT
print("-------------------------------------------------------")
print("UNOISE2 Script has Finished Successfully")
print("-------------------------------------------------------")
if not not args.debug:
print("Tmp Folder of files: %s" % tmp)
print("Amplicon sequence variants: %s" % passingOTUs)
print("ASV OTU Table: %s" % iSeq_otu_table)
print("Clustered OTUs: %s" % os.path.basename(final_otu))
print("OTU Table: %s" % os.path.basename(final_otu_table))
print("ASVs 2 OTUs: %s" % ClusterComp)
print("-------------------------------------------------------")
otu_print = final_otu.split('/')[-1]
tab_print = final_otu_table.split('/')[-1]
if 'darwin' in sys.platform:
print(colr.WARN + "\nExample of next cmd:" + colr.END +
" amptk filter -i %s -f %s -b <mock barcode>\n" %
(tab_print, otu_print))
else:
print(
"\nExample of next cmd: amptk filter -i %s -f %s -b <mock barcode>\n"
% (tab_print, otu_print))
def main(args):
parser = argparse.ArgumentParser(
prog='amptk-drop.py',
description='''Script that drops OTUs and then creates OTU table''',
epilog="""Written by Jon Palmer (2016) [email protected]""",
formatter_class=MyFormatter)
parser.add_argument('-i',
'--input',
required=True,
help='OTUs in FASTA format')
parser.add_argument('-r',
'--reads',
required=True,
help='Demuxed reads FASTQ format')
parser.add_argument('-o', '--out', help='Base output name')
parser.add_argument('-l',
'--list',
nargs='+',
help='Input list of (BC) names to remove')
parser.add_argument('-f',
'--file',
help='File containing list of names to remove')
args = parser.parse_args(args)
#get basename if not args.out passed
if args.out:
base = args.out
else:
if 'otus' in args.input:
base = os.path.basename(args.input).split('.otus')[0]
else:
base = os.path.basename(args.input).split('.f')[0]
#remove logfile if exists
log_name = base + '.amptk-drop.log'
if os.path.isfile(log_name):
os.remove(log_name)
amptklib.setupLogging(log_name)
cmd_args = " ".join(sys.argv) + '\n'
amptklib.log.debug(cmd_args)
print("-------------------------------------------------------")
#initialize script, log system info and usearch version
amptklib.SystemInfo()
#check the list or file parameters, one of them must have something
if not args.list:
if not args.file:
amptklib.log.error(
"Error, you must specifiy a list of OTU names or a file containing names"
)
sys.exit(1)
if not args.file:
if not args.list:
amptklib.log.error(
"Error, you must specifiy a list of OTU names or a file containing names"
)
sys.exit(1)
if args.list and args.file:
amptklib.log.error(
"Error, you must specifiy either list of OTU names or a file containing OTU names, not both"
)
sys.exit(1)
if args.file:
count = amptklib.line_count(args.file)
#load in list of names to remove
with open(args.file, 'r') as input:
lines = [line.rstrip('\n') for line in input]
if args.list:
count = len(args.list)
lines = args.list
#make sure it is a set, faster lookup
dropList = set(lines)
#load data
total = amptklib.countfasta(args.input)
amptklib.log.info("Loading %i OTUs" % total)
#load in the fasta file, change if in dictionary and output to stdout
amptklib.log.info("Dropping %i OTUs" % count)
newOTUs = base + '.cleaned.otus.fa'
with open(newOTUs, 'w') as otus:
with open(args.input, 'r') as fasta:
for rec in SeqIO.parse(fasta, 'fasta'):
if not rec.id in dropList:
SeqIO.write(rec, otus, 'fasta')
#now make new OTU table
amptklib.log.info("Mapping Reads to OTUs and Building OTU table")
newTable = base + '.cleaned.otu_table.txt'
tmpReads = base + '.reads.tmp'
uc_out = base + '.mapping.uc'
cmd = [
'vsearch', '--fastq_filter', args.reads, '--fastaout', tmpReads,
'--fastq_qmax', '55'
]
amptklib.runSubprocess(cmd, amptklib.log)
cmd = [
'vsearch', '--usearch_global', tmpReads, '--strand', 'plus', '--id',
'0.97', '--db', newOTUs, '--uc', uc_out, '--otutabout', newTable
]
amptklib.runSubprocess(cmd, amptklib.log)
#count OTUs
otu_count = amptklib.countfasta(newOTUs)
amptklib.log.info('{0:,}'.format(otu_count) + ' OTUs remaining')
#count reads mapped
total = amptklib.line_count(uc_out)
orig_total = amptklib.countfasta(tmpReads)
amptklib.log.info('{0:,}'.format(total) + ' reads mapped to OTUs ' +
'({0:.0f}%)'.format(total / float(orig_total) * 100))
#Print location of files to STDOUT
print("-------------------------------------------------------")
print("Clustered OTUs: %s" % newOTUs)
print("OTU Table: %s" % newTable)
print("-------------------------------------------------------")
#cleanup
amptklib.removefile(tmpReads)
amptklib.removefile(uc_out)
otu_print = newOTUs.split('/')[-1]
tab_print = newTable.split('/')[-1]
if 'darwin' in sys.platform:
print(colr.WARN + "\nExample of next cmd:" + colr.END +
" amptk filter -i %s -f %s -b <mock barcode>\n" %
(tab_print, otu_print))
else:
print(
"\nExample of next cmd: amptk filter -i %s -f %s -b <mock barcode>\n"
% (tab_print, otu_print))
def main(args):
parser = argparse.ArgumentParser(
prog='amptk-lulu.py',
description=
'''Script runs OTU table post processing LULU to identify low abundance error OTUs''',
epilog="""Written by Jon Palmer (2018) [email protected]""",
formatter_class=MyFormatter)
parser.add_argument('-i',
'--otu_table',
required=True,
help='Input OTU table')
parser.add_argument('-f',
'--fasta',
required=True,
help='Input OTUs (multi-fasta)')
parser.add_argument('-o', '--out', help='Output folder basename')
parser.add_argument('--min_ratio_type',
default='min',
choices=['min', 'avg'],
help="LULU minimum ratio threshold")
parser.add_argument('--min_ratio',
default=1,
type=int,
help="LULU minimum ratio")
parser.add_argument('--min_match',
default=84,
type=int,
help="LULU minimum match percent identity")
parser.add_argument('--min_relative_cooccurence',
default=95,
type=int,
help="LULU minimum relative cooccurance")
parser.add_argument('--debug',
action='store_true',
help='Remove Intermediate Files')
args = parser.parse_args(args)
#get location of R script
parentdir = os.path.join(os.path.dirname(amptklib.__file__))
luluScript = os.path.join(parentdir, 'runLULU.R')
if not args.out:
#get base name of files
if 'otu_table' in args.otu_table:
base = os.path.basename(args.otu_table).split(".otu_table")[0]
elif 'final.txt' in args.otu_table:
base = os.path.basename(args.otu_table).split(".final")[0]
else:
base = os.path.basename(args.otu_table).split(".txt")[0]
else:
base = args.out
#remove logfile if exists
log_name = base + '.amptk-lulu.log'
if os.path.isfile(log_name):
amptklib.removefile(log_name)
amptklib.setupLogging(log_name)
FNULL = open(os.devnull, 'w')
cmd_args = " ".join(sys.argv) + '\n'
amptklib.log.debug(cmd_args)
print("-------------------------------------------------------")
#initialize script, log system info and usearch version
amptklib.SystemInfo()
amptklib.versionDependencyChecks('usearch9')
#check dependencies
programs = ['Rscript', 'vsearch']
amptklib.CheckDependencies(programs)
Rversions = amptklib.checkRversion()
if Rversions[3] == '0.0.0':
amptklib.log.info("R v%s installed, LULU not installed")
sys.exit(1)
else:
amptklib.log.info("R v%s; LULU v%s" % (Rversions[0], Rversions[3]))
#this is a simple wrapper for an R script so easier to run from amptk menu
tmpdir = 'lulu_' + str(os.getpid())
if not os.path.isdir(tmpdir):
os.makedirs(tmpdir)
#generate the match list using the minimum match pident
match_file = os.path.join(tmpdir, 'match_file.txt')
amptklib.log.info("Loading {:,} OTUs".format(
amptklib.countfasta(args.fasta)))
amptklib.log.info(
"Generating pairwise percent identity between OTUs using VSEARCH at {:}% identity"
.format(args.min_match))
cmd = [
'vsearch', '--usearch_global',
os.path.abspath(args.fasta), '--db',
os.path.abspath(args.fasta), '--self', '--id',
str(args.min_match / 100), '--iddef', '1', '--userout', match_file,
'--userfields', 'query+target+id', '--maxaccepts', '0', '--query_cov',
'.9', '--maxhits', '10'
]
amptklib.runSubprocess(cmd, amptklib.log)
#now run LULU in R
LULU_log = os.path.join(tmpdir, 'LULU-R.log')
lulu_otu_table = base + '.lulu.otu_table.txt'
dropList = os.path.join(tmpdir, 'droplist.txt')
MapData = base + '.lulu.otu-map.txt'
amptklib.log.info("Running LULU algorithm")
cmd = [
'Rscript', '--vanilla', luluScript,
os.path.abspath(args.otu_table),
os.path.abspath(match_file), args.min_ratio_type,
str(args.min_ratio),
str(args.min_match),
str(args.min_relative_cooccurence / 100), lulu_otu_table, dropList,
MapData
]
amptklib.runSubprocess4(cmd, amptklib.log, LULU_log)
#get updated OTUs
remove = []
with open(dropList, 'rU') as dropped:
for line in dropped:
remove.append(line.rstrip())
lulu_otus = base + '.lulu.otus.fa'
with open(lulu_otus, 'w') as output:
with open(args.fasta, 'rU') as infasta:
for record in SeqIO.parse(infasta, 'fasta'):
if not record.id in remove:
output.write('>%s\n%s\n' % (record.id, record.seq))
amptklib.log.info(
"LULU has merged {:,} OTUs, output data contains {:,} OTUs".format(
len(remove), amptklib.countfasta(lulu_otus)))
amptklib.log.info("LULU OTU table post processing finished\n\
----------------------------------\n\
OTU table: {:}\n\
OTU FASTA: {:}\n\
LULU map: {:}\n\
----------------------------------".format(lulu_otu_table, lulu_otus, MapData))
if 'win32' in sys.platform:
print(
"\nExample of next cmd: amptk taxonomy -f %s -i %s -m mapping_file.txt -d ITS2\n"
% (lulu_otus, lulu_otu_table))
else:
print(colr.WARN + "\nExample of next cmd:" + colr.END +
" amptk taxonomy -f %s -i %s -m mapping_file.txt -d ITS2\n" %
(lulu_otus, lulu_otu_table))
if not args.debug:
if os.path.isdir(tmpdir):
shutil.rmtree(tmpdir)
print("-------------------------------------------------------")
