def write_csv_with_header(self, infile):
with helpers.getFileHandle(self.filepath, 'wt') as writer:
with helpers.getFileHandle(infile) as reader:
writer.write(self.header_line)
self.write_csv_data(reader, writer)
self.__write_yaml()
def write_headerless_csv(self, infile):
with helpers.getFileHandle(self.filepath, 'wt') as writer:
with helpers.getFileHandle(infile) as reader:
if not reader.readline() == self.header_line:
raise CsvWriterError("cannot write, wrong header")
self.write_csv_data(reader, writer)
self.write_yaml()
def concatenate_files(self, infiles):
header = self.header_line if self.header else None
with helpers.getFileHandle(self.filepath, 'wt') as writer:
if header:
writer.write(header)
for infile in infiles:
with helpers.getFileHandle(infile) as reader:
self.write_csv_data(reader, writer)
self.write_yaml()
def parse_segs(self, segs, metrics):
"""parses hmmcopy segments data
:param segs: path to hmmcopy segs file
"""
header_flag, dtypes, columns = csvutils.get_metadata(segs)
header = {v: i for i, v in enumerate(columns)}
segs_data = {}
with helpers.getFileHandle(segs) as segfile:
if header_flag:
assert segfile.readline().strip().split(',') == columns
for row in segfile:
row = row.strip().split(',')
chrom = row[header["chr"]]
start = row[header["start"]]
end = row[header["end"]]
cell_id = row[header["cell_id"]]
state = row[header["state"]]
# float to handle scientific notation
segment_length = int(float(end)) - int(float(start)) + 1
if metrics[cell_id] > self.quality_threshold:
continue
segs_data[cell_id] = [
cell_id, chrom, start, end, segment_length, state
]
return segs_data
def trim_fastqs(fastq1, fastq2, cell_id, tempdir, adapter, adapter2,
trimgalore_docker):
"""
run fastqc on both fastq files
run trimgalore if needed, copy if not.
"""
with helpers.getFileHandle(fastq1) as reader:
if not reader.readline():
return fastq1, fastq2
trim1 = os.path.join(tempdir, "fastq_R1_trimmed.fastq.gz")
trim2 = os.path.join(tempdir, "fastq_R2_trimmed.fastq.gz")
reports_dir = os.path.join(tempdir, 'fastqc_reports')
if not os.path.exists(reports_dir):
helpers.makedirs(reports_dir)
rep1 = os.path.join(reports_dir, '{}_trimgalore_R1.html'.format(cell_id))
rep2 = os.path.join(reports_dir, '{}_trimgalore_R2.html'.format(cell_id))
qcrep1 = os.path.join(reports_dir,
'{}_trimgalore_qc_R1.html'.format(cell_id))
qcrep2 = os.path.join(reports_dir,
'{}_trimgalore_qc_R2.html'.format(cell_id))
qczip1 = os.path.join(reports_dir,
'{}_trimgalore_qc_R1.zip'.format(cell_id))
qczip2 = os.path.join(reports_dir,
'{}_trimgalore_qc_R2.zip'.format(cell_id))
run_tg = RunTrimGalore(fastq1, fastq2, trim1, trim2, 'trim_galore',
'cutadapt', tempdir, adapter, adapter2, rep1, rep2,
qcrep1, qcrep2, qczip1, qczip2, trimgalore_docker)
run_tg.run_trimgalore()
run_tg.gather_outputs()
return trim1, trim2
def write_summary_counts(counts, outfile, cell_id, fastqscreen_params):
genomes = [genome['name'] for genome in fastqscreen_params['genomes']]
summary_counts = defaultdict(int)
for read_end, read_end_counts in counts.items():
for flags, count in read_end_counts.items():
hit_orgs = [v[0] for v in flags if v[1] > 0]
for org in hit_orgs:
summary_counts[org] += count
if len(hit_orgs) > 1:
for org in hit_orgs:
summary_counts['{}_multihit'.format(org)] += count
elif len(hit_orgs) == 0:
summary_counts['nohit'] += count
with helpers.getFileHandle(outfile, 'wt') as writer:
if not summary_counts:
columns = ['cell_id']
columns += ['fastqscreen_' + genome for genome in genomes]
columns += ['fastqscreen_nohit']
header = ','.join(columns) + '\n'
writer.write(header)
return
keys = sorted(summary_counts.keys())
header = ['cell_id'] + ['fastqscreen_{}'.format(key) for key in keys]
header = ','.join(header) + '\n'
writer.write(header)
values = [cell_id] + [summary_counts[v] for v in keys]
values = ','.join(map(str, values)) + '\n'
writer.write(values)
def run_fastq_screen_paired_end(fastq_r1,
fastq_r2,
tempdir,
params,
docker_image=None):
def get_basename(filepath):
filepath_base = os.path.basename(filepath)
if filepath_base.endswith('.fastq.gz'):
filepath_base = filepath_base[:-len('.fastq.gz')]
elif filepath_base.endswith('.fq.gz'):
filepath_base = filepath_base[:-len('.fq.gz')]
elif filepath_base.endswith('.fastq'):
filepath_base = filepath_base[:-len('.fastq')]
elif filepath_base.endswith('.fq'):
filepath_base = filepath_base[:-len('.fq')]
else:
raise Exception('unknown file format. {}'.format(filepath))
return filepath_base
basename = get_basename(fastq_r1)
tagged_fastq_r1 = os.path.join(tempdir,
'{}.tagged.fastq.gz'.format(basename))
basename = get_basename(fastq_r2)
tagged_fastq_r2 = os.path.join(tempdir,
'{}.tagged.fastq.gz'.format(basename))
# fastq screen fails if run on empty files
with helpers.getFileHandle(fastq_r1) as reader:
if not reader.readline():
shutil.copy(fastq_r1, tagged_fastq_r1)
shutil.copy(fastq_r2, tagged_fastq_r2)
return tagged_fastq_r1, tagged_fastq_r2
config = os.path.join(tempdir, 'fastq_screen.config')
with open(config, 'w') as config_writer:
for genome in params['genomes']:
genome_name = genome['name']
genome_path = genome['path']
outstr = '\t'.join(['DATABASE', genome_name, genome_path]) + '\n'
config_writer.write(outstr)
cmd = [
'fastq_screen',
'--aligner',
params['aligner'],
'--conf',
config,
'--outdir',
tempdir,
'--tag',
fastq_r1,
fastq_r2,
]
pypeliner.commandline.execute(*cmd, docker_image=docker_image)
return tagged_fastq_r1, tagged_fastq_r2
def write_detailed_counts(counts, outfile, cell_id, fastqscreen_params):
header = None
genomes = [genome['name'] for genome in fastqscreen_params['genomes']]
with helpers.getFileHandle(outfile, 'wt') as writer:
for read_end, read_end_counts in counts.items():
if not read_end_counts and not header:
outstr = ['cell_id', 'readend'] + genomes + ['count']
writer.write(','.join(outstr) + '\n')
header = 1
continue
if not header:
outstr = ['cell_id', 'readend']
outstr += [v[0] for v in list(read_end_counts.keys())[0]]
outstr += ['count']
writer.write(','.join(outstr) + '\n')
header = 1
for flags, count in read_end_counts.items():
outstr = [cell_id, read_end]
outstr += [v[1] for v in flags]
outstr += [count]
writer.write(','.join(map(str, outstr)) + '\n')
def filter_reads(input_r1, input_r2, output_r1, output_r2, reference):
reader = fastqutils.PairedTaggedFastqReader(input_r1, input_r2)
with helpers.getFileHandle(output_r1,
'wt') as writer_r1, helpers.getFileHandle(
output_r2, 'wt') as writer_r2:
for read_1, read_2 in reader.filter_read_iterator(reference):
read_1 = reader.add_tag_to_read_comment(read_1)
read_2 = reader.add_tag_to_read_comment(read_2)
for line in read_1:
writer_r1.write(line)
for line in read_2:
writer_r2.write(line)
def read_metrics_csv(self, cndata):
"""
read the input file
"""
samples = cndata.index
data = {}
numread_data = {}
reads_per_bin_data = {}
sepdata = defaultdict(list)
colordata = {}
header, dtypes, columns = csvutils.get_metadata(self.metrics)
idxs = self.build_label_indices(columns)
color_col = self.color_by_col
sep_col = self.plot_by_col
with helpers.getFileHandle(self.metrics) as freader:
if header:
assert freader.readline().strip().split(',') == columns
for line in freader:
line = line.strip().split(self.sep)
sample_id = line[idxs['cell_id']]
# skip samples that are just na or inf
if sample_id not in samples:
continue
val = line[idxs["mad_neutral_state"]]
val = float('nan') if val == "NA" else float(val)
ec = 'all' if sep_col == 'all' else line[idxs[sep_col]]
cc = line[idxs[color_col]]
numreads = float(line[idxs['total_mapped_reads_hmmcopy']])
reads_per_bin = line[idxs['median_hmmcopy_reads_per_bin']]
reads_per_bin = 0 if reads_per_bin == "NA" else float(
reads_per_bin)
if self.cellcalls and cc not in self.cellcalls:
continue
numread_data[sample_id] = numreads
data[sample_id] = val
reads_per_bin_data[sample_id] = reads_per_bin
colordata[sample_id] = cc
sepdata[ec].append(sample_id)
return data, sepdata, colordata, numread_data, reads_per_bin_data
def generate_metadata(self):
with helpers.getFileHandle(self.filepath) as inputfile:
header = inputfile.readline().strip()
sep = self.__detect_sep_from_header(header)
columns = header.split(sep)
header = True
dtypes = self.__generate_dtypes(sep=sep)
return header, sep, dtypes, columns
def re_tag_reads(infile, outfile):
reader = fastqutils.TaggedFastqReader(infile)
with helpers.getFileHandle(outfile, 'wt') as writer:
for read in reader.get_read_iterator():
read = reader.add_tag_to_read_comment(read)
for line in read:
writer.write(line)
def __write_yaml(self):
yamldata = {'header': self.header, 'sep': self.sep, 'columns': []}
for column in self.columns:
data = {'name': column, 'dtype': self.dtypes[column]}
yamldata['columns'].append(data)
with helpers.getFileHandle(self.yaml_file, 'wt') as f:
yaml.safe_dump(yamldata, f, default_flow_style=False)
def read_segs_csv(self):
"""
read the input file
"""
data = {}
bins = {}
header, dtypes, columns = csvutils.get_metadata(self.input)
with helpers.getFileHandle(self.input, 'rt') as freader:
idxs = self.build_label_indices(columns)
if header:
assert freader.readline().strip().split(',') == columns
for line in freader:
line = line.strip().split(self.sep)
sample_id = line[idxs['cell_id']]
val = line[idxs[self.column_name]]
val = float('nan') if val == "NA" else float(val)
chrom = line[idxs['chr']]
start = int(line[idxs['start']])
end = int(line[idxs['end']])
seg = (chrom, start, end)
if self.mappability_threshold and float(
line[idxs["map"]]) <= self.mappability_threshold:
val = float("nan")
if chrom not in bins:
bins[chrom] = set()
bins[chrom].add((start, end))
# just a sanity check, not required
if sample_id in data and seg in data[sample_id]:
raise Exception("repeated val")
if sample_id not in data:
data[sample_id] = {}
data[sample_id][seg] = val
samples = sorted(data.keys())
bins = self.sort_bins_csv(bins)
data = self.conv_to_matrix(data, bins, samples)
data = self.get_pandas_dataframe(data, bins)
return data
def merge_fastqs(inputs, output):
read_counter = 0
with helpers.getFileHandle(output, 'wt') as merged:
for cellid in inputs:
infile = inputs[cellid]
reader = fastqutils.FastqReader(infile)
for read in reader.get_read_iterator():
read[0] = '@' + str(
int(read_counter)) + '/' + read[0].split('/')[1]
for line in read:
merged.write(line)
read_counter += 1
def annotate_ref_alt(haps_csv, refdir, output_csv):
thousand_genomes = os.path.join(refdir, 'thousand_genomes_snps.tsv')
annotation_data = {}
with helpers.getFileHandle(thousand_genomes, 'rt') as db:
for line in db:
line = line.strip().split('\t')
chrom, pos, ref, alt = line
annotation_data[(chrom, pos)] = (ref, alt)
with helpers.getFileHandle(haps_csv,
'rt') as reader, helpers.getFileHandle(
output_csv, 'wt') as writer:
header = reader.readline().strip()
header += '\tref\talt\n'
writer.write(header)
for line in reader:
line = line.strip()
l_split = line.split('\t')
chrom = l_split[0]
pos = l_split[1]
if (chrom, pos) in annotation_data:
ref, alt = annotation_data[(chrom, pos)]
else:
ref = 'NA'
alt = 'NA'
line += '\t{}\t{}\n'.format(ref, alt)
writer.write(line)
def re_index_reads(input_fastq,
output_fastq,
cell_id,
cells,
cell_read_counts,
tag=False):
start_count = get_start_count(cells, cell_read_counts, cell_id)
with helpers.getFileHandle(input_fastq) as infile:
with helpers.getFileHandle(output_fastq, 'wt') as outfile:
while True:
fastq_read = list(islice(infile, 4))
if not fastq_read:
break
assert len(fastq_read) == 4, 'fastq file format error'
if not fastq_read[0].startswith('@'):
raise ValueError(
'Expected @ as first character of read name')
if not fastq_read[2].startswith('+'):
raise ValueError(
'Expected = as first character of read comment')
fastq_read[0] = '@' + str(
int(start_count)) + '/' + fastq_read[0].split('/')[1]
start_count += 1
if tag:
fastq_read[2] = '+' + cell_id + "\n"
for fastq_line in fastq_read:
outfile.write(fastq_line)
def filter_tag_reads(input_r1, input_r2, output_r1, output_r2, params):
genomes = [v['name'] for v in params['genomes']]
if not params['filter_tags']:
filter_tags = set()
else:
filter_tags = set(params['filter_tags'])
reader = fastqutils.PairedTaggedFastqReader(input_r1, input_r2)
with helpers.getFileHandle(output_r1,
'wt') as writer_r1, helpers.getFileHandle(
output_r2, 'wt') as writer_r2:
for read_1, read_2 in reader.filter_read_iterator(
genomes, filter_tags):
read_1 = reader.add_tag_to_read_comment(read_1)
read_2 = reader.add_tag_to_read_comment(read_2)
for line in read_1:
writer_r1.write(line)
for line in read_2:
writer_r2.write(line)
def get_read_count(input_fastq):
def blocks(files, size=65536):
while True:
b = files.read(size)
if not b:
break
yield b
with helpers.getFileHandle(input_fastq) as indata:
linecount = sum(bl.count("\n") for bl in blocks(indata))
assert linecount % 4 == 0
readcount = linecount / 4
return int(readcount)
def __parse_metadata(self):
with helpers.getFileHandle(self.filepath + '.yaml') as yamlfile:
yamldata = yaml.safe_load(yamlfile)
header = yamldata['header']
sep = yamldata.get('sep', ',')
dtypes = {}
columns = []
for coldata in yamldata['columns']:
colname = coldata['name']
dtypes[colname] = coldata['dtype']
columns.append(colname)
return header, sep, dtypes, columns
def get_read_iterator(self):
with helpers.getFileHandle(self.file_path) as fq_reader:
while True:
fastq_read = list(islice(fq_reader, 4))
fastq_read = [line for line in fastq_read]
if not fastq_read:
break
assert len(fastq_read) == 4, 'fastq file format error'
if not fastq_read[0].startswith('@'):
raise ValueError('Expected @ as first character of read name')
if not fastq_read[2].startswith('+'):
raise ValueError('Expected = as first character of read comment')
yield fastq_read
def check_empty_file(self, path):
"""checks if file is empty
:param path: path to the file
:returns bool: true if file is empty, False o.w.
"""
if not os.path.exists(path):
raise IOError("Input file %s missing" % path)
if os.stat(path).st_size == 0:
return True
with helpers.getFileHandle(path) as infile:
# header line
_ = infile.readline()
# data?
data = infile.readline()
if not data:
return True
return False
def write_detailed_counts(counts, outfile, cell_id):
header = None
with helpers.getFileHandle(outfile, 'wt') as writer:
for read_end, read_end_counts in counts.items():
if not read_end_counts:
continue
if not header:
outstr = ['cell_id', 'readend']
outstr += [v[0] for v in list(read_end_counts.keys())[0]]
outstr += ['count']
writer.write(','.join(outstr) + '\n')
header = 1
for flags, count in read_end_counts.items():
outstr = [cell_id, read_end]
outstr += [v[1] for v in flags]
outstr += [count]
writer.write(','.join(map(str, outstr)) + '\n')
def write_summary_counts(counts, outfile, cell_id):
summary_counts = defaultdict(int)
for read_end, read_end_counts in counts.items():
for flags, count in read_end_counts.items():
hit_orgs = [v[0] for v in flags if v[1] > 0]
for org in hit_orgs:
summary_counts[org] += count
if len(hit_orgs) > 1:
for org in hit_orgs:
summary_counts['{}_multihit'.format(org)] += count
elif len(hit_orgs) == 0:
summary_counts['nohit'] += count
with helpers.getFileHandle(outfile, 'wt') as writer:
keys = sorted(summary_counts.keys())
header = ['cell_id'] + ['fastqscreen_{}'.format(key) for key in keys]
header = ','.join(header) + '\n'
writer.write(header)
values = [cell_id] + [summary_counts[v] for v in keys]
values = ','.join(map(str, values)) + '\n'
writer.write(values)
def __detect_sep_from_file(self):
with helpers.getFileHandle(self.filepath) as reader:
header = reader.readline().strip()
return self.__detect_sep_from_header(header)
