def test_split_fasta_equal_num_seqs_per_file(self):
"""split_fasta funcs as expected when equal num seqs go to each file
"""
fd, filename_prefix = mkstemp(dir=get_qiime_temp_dir(),
prefix='split_fasta_tests',
suffix='')
close(fd)
infile = [
'>seq1', 'AACCTTAA', '>seq2', 'TTAACC', 'AATTAA', '>seq3',
'CCTT--AA'
]
actual = split_fasta(infile, 1, filename_prefix)
actual_seqs = []
for fp in actual:
actual_seqs += list(open(fp))
remove_files(actual)
expected = ['%s.%d.fasta' % (filename_prefix, i) for i in range(3)]
self.assertEqual(actual, expected)
self.assertEqual(
SequenceCollection.from_fasta_records(parse_fasta(infile), DNA),
SequenceCollection.from_fasta_records(parse_fasta(actual_seqs),
DNA))
def test_split_fasta_diff_num_seqs_per_file_alt(self):
"""split_fasta funcs always catches all seqs
"""
# start with 59 seqs (b/c it's prime, so should make more
# confusing splits)
in_seqs = SequenceCollection.from_fasta_records(
[('seq%s' % k, 'AACCTTAA') for k in range(59)], DNA)
infile = in_seqs.to_fasta().split('\n')
# test seqs_per_file from 1 to 1000
for i in range(1, 1000):
fd, filename_prefix = mkstemp(dir=get_qiime_temp_dir(),
prefix='split_fasta_tests',
suffix='')
close(fd)
actual = split_fasta(infile, i, filename_prefix)
actual_seqs = []
for fp in actual:
actual_seqs += list(open(fp))
# remove the files now, so if the test fails they still get
# cleaned up
remove_files(actual)
# building seq collections from infile and the split files result in
# equivalent seq collections
self.assertEqual(
SequenceCollection.from_fasta_records(parse_fasta(infile),
DNA),
SequenceCollection.from_fasta_records(parse_fasta(actual_seqs),
DNA))
def fast_denoiser(
sff_fps, fasta_fp, tmp_outdir, num_cpus, primer, verbose=True,
titanium=False):
"""wrapper function calling methods from the Denoiser package."""
if num_cpus > 1:
denoise_seqs(sff_fps, fasta_fp, tmp_outdir,
primer=primer, cluster=True, num_cpus=num_cpus,
verbose=verbose, titanium=titanium)
else:
denoise_seqs(sff_fps, fasta_fp, tmp_outdir, primer=primer,
verbose=verbose, titanium=titanium)
# read centroids and singletons
centroids = parse_fasta(open(tmp_outdir + "/centroids.fasta"))
singletons = parse_fasta(open(tmp_outdir + "/singletons.fasta"))
seqs = chain(centroids, singletons)
# read mapping
mapping = {}
cluster_mapping = open(tmp_outdir + "/denoiser_mapping.txt")
for i, cluster in enumerate(cluster_mapping):
cluster, members = cluster.split(':')
members = members.split()
clust = [cluster]
clust.extend(members)
mapping[i] = clust
return seqs, mapping
def test_deblur_with_non_default_error_profile(self):
error_dist = [
1, 0.05, 0.000005, 0.000005, 0.000005, 0.000005, 0.0000025,
0.0000025, 0.0000025, 0.0000025, 0.0000025, 0.0000005, 0.0000005,
0.0000005, 0.0000005
]
seqs_f = StringIO(TEST_SEQS_2)
obs = deblur(parse_fasta(seqs_f), error_dist=error_dist)
exp = [
Sequence(
"E.Coli-999;size=720;",
"tacggagggtgcaagcgttaatcggaattactgggcgtaaagcgcacgcaggcggt"
"ttgttaagtcagatgtgaaatccccgggctcaacctgggaactgcatctgatactg"
"gcaagcttgagtctcgtagaggggggcagaattccag")
]
# Trying with a numpy array
error_dist = np.array([
1, 0.05, 0.000005, 0.000005, 0.000005, 0.000005, 0.0000025,
0.0000025, 0.0000025, 0.0000025, 0.0000025, 0.0000005, 0.0000005,
0.0000005, 0.0000005
])
seqs_f = StringIO(TEST_SEQS_2)
obs = deblur(parse_fasta(seqs_f), error_dist=error_dist)
self.assertEqual(obs, exp)
def test_split_fasta_diff_num_seqs_per_file(self):
"""split_fasta funcs as expected when diff num seqs go to each file
"""
fd, filename_prefix = mkstemp(dir=get_qiime_temp_dir(),
prefix='split_fasta_tests',
suffix='')
close(fd)
infile = ['>seq1', 'AACCTTAA', '>seq2', 'TTAACC', 'AATTAA',
'>seq3', 'CCTT--AA']
actual = split_fasta(infile, 2, filename_prefix)
actual_seqs = []
for fp in actual:
actual_seqs += list(open(fp))
remove_files(actual)
expected = ['%s.%d.fasta' % (filename_prefix, i) for i in range(2)]
# list of file paths is as expected
self.assertEqual(actual, expected)
# building seq collections from infile and the split files result in
# equivalent seq collections
self.assertEqual(
SequenceCollection.from_fasta_records(parse_fasta(infile), DNA),
SequenceCollection.from_fasta_records(parse_fasta(actual_seqs), DNA))
def test_split_fasta_diff_num_seqs_per_file(self):
"""split_fasta funcs as expected when diff num seqs go to each file
"""
fd, filename_prefix = mkstemp(dir=get_qiime_temp_dir(),
prefix='split_fasta_tests',
suffix='')
close(fd)
infile = [
'>seq1', 'AACCTTAA', '>seq2', 'TTAACC', 'AATTAA', '>seq3',
'CCTT--AA'
]
actual = split_fasta(infile, 2, filename_prefix)
actual_seqs = []
for fp in actual:
actual_seqs += list(open(fp))
remove_files(actual)
expected = ['%s.%d.fasta' % (filename_prefix, i) for i in range(2)]
# list of file paths is as expected
self.assertEqual(actual, expected)
# building seq collections from infile and the split files result in
# equivalent seq collections
self.assertEqual(
SequenceCollection.from_fasta_records(parse_fasta(infile), DNA),
SequenceCollection.from_fasta_records(parse_fasta(actual_seqs),
DNA))
def test_split_fasta_diff_num_seqs_per_file_alt(self):
"""split_fasta funcs always catches all seqs
"""
# start with 59 seqs (b/c it's prime, so should make more
# confusing splits)
in_seqs = SequenceCollection.from_fasta_records(
[('seq%s' % k, 'AACCTTAA') for k in range(59)], DNA)
infile = in_seqs.to_fasta().split('\n')
# test seqs_per_file from 1 to 1000
for i in range(1, 1000):
fd, filename_prefix = mkstemp(dir=get_qiime_temp_dir(),
prefix='split_fasta_tests',
suffix='')
close(fd)
actual = split_fasta(infile, i, filename_prefix)
actual_seqs = []
for fp in actual:
actual_seqs += list(open(fp))
# remove the files now, so if the test fails they still get
# cleaned up
remove_files(actual)
# building seq collections from infile and the split files result in
# equivalent seq collections
self.assertEqual(
SequenceCollection.from_fasta_records(parse_fasta(infile), DNA),
SequenceCollection.from_fasta_records(parse_fasta(actual_seqs), DNA))
def fast_denoiser(sff_fps, fasta_fp, tmp_outdir, num_cpus, primer, verbose=True, titanium=False):
"""wrapper function calling methods from the Denoiser package."""
if num_cpus > 1:
denoise_seqs(
sff_fps,
fasta_fp,
tmp_outdir,
primer=primer,
cluster=True,
num_cpus=num_cpus,
verbose=verbose,
titanium=titanium,
)
else:
denoise_seqs(sff_fps, fasta_fp, tmp_outdir, primer=primer, verbose=verbose, titanium=titanium)
# read centroids and singletons
centroids = parse_fasta(open(tmp_outdir + "/centroids.fasta"))
singletons = parse_fasta(open(tmp_outdir + "/singletons.fasta"))
seqs = chain(centroids, singletons)
# read mapping
mapping = {}
cluster_mapping = open(tmp_outdir + "/denoiser_mapping.txt")
for i, cluster in enumerate(cluster_mapping):
cluster, members = cluster.split(":")
members = members.split()
clust = [cluster]
clust.extend(members)
mapping[i] = clust
return seqs, mapping
def __call__(self,
seq_path,
result_path=None,
log_path=None,
failure_path=None):
# load candidate sequences
seq_file = open(seq_path, 'U')
candidate_sequences = parse_fasta(seq_file)
# load template sequences
template_alignment = []
template_alignment_fp = self.Params['template_filepath']
for seq_id, seq in parse_fasta(open(template_alignment_fp)):
# replace '.' characters with '-' characters
template_alignment.append((seq_id, seq.replace('.', '-').upper()))
template_alignment = Alignment.from_fasta_records(template_alignment,
DNASequence,
validate=True)
# initialize_logger
logger = NastLogger(log_path)
# get function for pairwise alignment method
pairwise_alignment_f = pairwise_alignment_methods[
self.Params['pairwise_alignment_method']]
pynast_aligned, pynast_failed = pynast_seqs(
candidate_sequences,
template_alignment,
min_pct=self.Params['min_pct'],
min_len=self.Params['min_len'],
align_unaligned_seqs_f=pairwise_alignment_f,
logger=logger,
temp_dir=get_qiime_temp_dir())
logger.record(str(self))
for i, seq in enumerate(pynast_failed):
skb_seq = DNASequence(str(seq), id=seq.Name)
pynast_failed[i] = skb_seq
pynast_failed = SequenceCollection(pynast_failed)
for i, seq in enumerate(pynast_aligned):
skb_seq = DNASequence(str(seq), id=seq.Name)
pynast_aligned[i] = skb_seq
pynast_aligned = Alignment(pynast_aligned)
if failure_path is not None:
fail_file = open(failure_path, 'w')
fail_file.write(pynast_failed.to_fasta())
fail_file.close()
if result_path is not None:
result_file = open(result_path, 'w')
result_file.write(pynast_aligned.to_fasta())
result_file.close()
return None
else:
return pynast_aligned
def setUp(self):
""" """
self.fasta_lines1 = fasta_lines1.split("\n")
self.fasta_lines1_mixed_case = fasta_lines1_mixed_case.split("\n")
self.fasta_lines1_exp = list(parse_fasta(fasta_lines1_exp.split("\n")))
self.fasta_lines1_mixed_case_exp = list(parse_fasta(fasta_lines1_mixed_case_exp.split("\n")))
self.fasta_lines1_exp_null_desc_mapper = list(parse_fasta(fasta_lines1_exp_null_desc_mapper.split("\n")))
def __call__(self, seq_path, result_path=None, log_path=None,
failure_path=None):
# load candidate sequences
seq_file = open(seq_path, 'U')
candidate_sequences = parse_fasta(seq_file)
# load template sequences
template_alignment = []
template_alignment_fp = self.Params['template_filepath']
for seq_id, seq in parse_fasta(open(template_alignment_fp)):
# replace '.' characters with '-' characters
template_alignment.append((seq_id, seq.replace('.', '-').upper()))
try:
template_alignment = LoadSeqs(data=template_alignment, moltype=DNA,
aligned=DenseAlignment)
except KeyError as e:
raise KeyError('Only ACGT-. characters can be contained in template alignments.' +
' The offending character was: %s' % e)
# initialize_logger
logger = NastLogger(log_path)
# get function for pairwise alignment method
pairwise_alignment_f = pairwise_alignment_methods[
self.Params['pairwise_alignment_method']]
pynast_aligned, pynast_failed = pynast_seqs(
candidate_sequences,
template_alignment,
min_pct=self.Params['min_pct'],
min_len=self.Params['min_len'],
align_unaligned_seqs_f=pairwise_alignment_f,
logger=logger,
temp_dir=get_qiime_temp_dir())
logger.record(str(self))
if failure_path is not None:
fail_file = open(failure_path, 'w')
for seq in pynast_failed:
fail_file.write(seq.toFasta())
fail_file.write('\n')
fail_file.close()
if result_path is not None:
result_file = open(result_path, 'w')
for seq in pynast_aligned:
result_file.write(seq.toFasta())
result_file.write('\n')
result_file.close()
return None
else:
try:
return LoadSeqs(data=pynast_aligned, aligned=DenseAlignment)
except ValueError:
return {}
def setUp(self):
""" """
self.fasta_lines1 = fasta_lines1.split('\n')
self.fasta_lines1_mixed_case = fasta_lines1_mixed_case.split('\n')
self.fasta_lines1_exp = list(parse_fasta(fasta_lines1_exp.split('\n')))
self.fasta_lines1_mixed_case_exp = list(
parse_fasta(fasta_lines1_mixed_case_exp.split('\n')))
self.fasta_lines1_exp_null_desc_mapper = list(
parse_fasta(fasta_lines1_exp_null_desc_mapper.split('\n')))
def setUp(self):
fd, self.pynast_test1_input_fp = mkstemp(prefix="PyNastAlignerTests_", suffix=".fasta")
close(fd)
with open(self.pynast_test1_input_fp, "w") as f:
f.write(pynast_test1_input_fasta)
fd, self.pynast_test1_template_fp = mkstemp(prefix="PyNastAlignerTests_", suffix="template.fasta")
close(fd)
with open(self.pynast_test1_template_fp, "w") as f:
f.write(pynast_test1_template_fasta)
fd, self.pynast_test_template_w_dots_fp = mkstemp(prefix="PyNastAlignerTests_", suffix="template.fasta")
close(fd)
with open(self.pynast_test_template_w_dots_fp, "w") as f:
f.write(pynast_test1_template_fasta.replace("-", "."))
fd, self.pynast_test_template_w_u_fp = mkstemp(prefix="PyNastAlignerTests_", suffix="template.fasta")
close(fd)
with open(self.pynast_test_template_w_u_fp, "w") as f:
f.write(pynast_test1_template_fasta.replace("T", "U"))
fd, self.pynast_test_template_w_lower_fp = mkstemp(prefix="PyNastAlignerTests_", suffix="template.fasta")
close(fd)
with open(self.pynast_test_template_w_lower_fp, "w") as f:
f.write(pynast_test1_template_fasta.lower())
# create temp file names (and touch them so we can reliably
# clean them up)
fd, self.result_fp = mkstemp(prefix="PyNastAlignerTests_", suffix=".fasta")
close(fd)
open(self.result_fp, "w").close()
fd, self.failure_fp = mkstemp(prefix="PyNastAlignerTests_", suffix=".fasta")
close(fd)
open(self.failure_fp, "w").close()
fd, self.log_fp = mkstemp(prefix="PyNastAlignerTests_", suffix=".log")
close(fd)
open(self.log_fp, "w").close()
self._paths_to_clean_up = [
self.pynast_test1_input_fp,
self.result_fp,
self.failure_fp,
self.log_fp,
self.pynast_test1_template_fp,
self.pynast_test_template_w_dots_fp,
self.pynast_test_template_w_u_fp,
self.pynast_test_template_w_lower_fp,
]
self.pynast_test1_aligner = PyNastAligner({"template_filepath": self.pynast_test1_template_fp, "min_len": 15})
self.pynast_test1_expected_aln = Alignment.from_fasta_records(parse_fasta(pynast_test1_expected_alignment), DNA)
self.pynast_test1_expected_fail = SequenceCollection.from_fasta_records(
parse_fasta(pynast_test1_expected_failure), DNA
)
def __call__(self, seq_path, result_path=None, log_path=None,
failure_path=None):
# load candidate sequences
seq_file = open(seq_path, 'U')
candidate_sequences = parse_fasta(seq_file)
# load template sequences
template_alignment = []
template_alignment_fp = self.Params['template_filepath']
for seq_id, seq in parse_fasta(open(template_alignment_fp)):
# replace '.' characters with '-' characters
template_alignment.append((seq_id, seq.replace('.', '-').upper()))
template_alignment = Alignment.from_fasta_records(
template_alignment, DNASequence, validate=True)
# initialize_logger
logger = NastLogger(log_path)
# get function for pairwise alignment method
pairwise_alignment_f = pairwise_alignment_methods[
self.Params['pairwise_alignment_method']]
pynast_aligned, pynast_failed = pynast_seqs(
candidate_sequences,
template_alignment,
min_pct=self.Params['min_pct'],
min_len=self.Params['min_len'],
align_unaligned_seqs_f=pairwise_alignment_f,
logger=logger,
temp_dir=get_qiime_temp_dir())
logger.record(str(self))
for i, seq in enumerate(pynast_failed):
skb_seq = DNASequence(str(seq), id=seq.Name)
pynast_failed[i] = skb_seq
pynast_failed = SequenceCollection(pynast_failed)
for i, seq in enumerate(pynast_aligned):
skb_seq = DNASequence(str(seq), id=seq.Name)
pynast_aligned[i] = skb_seq
pynast_aligned = Alignment(pynast_aligned)
if failure_path is not None:
fail_file = open(failure_path, 'w')
fail_file.write(pynast_failed.to_fasta())
fail_file.close()
if result_path is not None:
result_file = open(result_path, 'w')
result_file.write(pynast_aligned.to_fasta())
result_file.close()
return None
else:
return pynast_aligned
def test_deblur_with_non_default_error_profile(self):
error_dist = [
1,
0.05,
0.000005,
0.000005,
0.000005,
0.000005,
0.0000025,
0.0000025,
0.0000025,
0.0000025,
0.0000025,
0.0000005,
0.0000005,
0.0000005,
0.0000005,
]
seqs_f = StringIO(TEST_SEQS_2)
obs = deblur(parse_fasta(seqs_f), error_dist=error_dist)
exp = [
Sequence(
"E.Coli-999;size=720;",
"tacggagggtgcaagcgttaatcggaattactgggcgtaaagcgcacgcaggcggt"
"ttgttaagtcagatgtgaaatccccgggctcaacctgggaactgcatctgatactg"
"gcaagcttgagtctcgtagaggggggcagaattccag",
)
]
# Trying with a numpy array
error_dist = np.array(
[
1,
0.05,
0.000005,
0.000005,
0.000005,
0.000005,
0.0000025,
0.0000025,
0.0000025,
0.0000025,
0.0000025,
0.0000005,
0.0000005,
0.0000005,
0.0000005,
]
)
seqs_f = StringIO(TEST_SEQS_2)
obs = deblur(parse_fasta(seqs_f), error_dist=error_dist)
self.assertEqual(obs, exp)
def combine_mappings(fasta_fh, mapping_fh, denoised_seqs_fh,
otu_picker_otu_map_fh, out_dir):
"""Combine denoiser and OTU picker mapping file, replace flowgram IDs.
fasta_fh: a fasta file with labels as produced by Qiime's split_libraries.py
used to replace flowgram id with the unique se_sample_id
mapping_fh: The cluster mapping from the denoiser.py
denoised_seqs_fh: the Fasta output files from denoiser.py
otu_picker_map_fh: cluster map from otu picker on denoised_seqs_fh
out_dir: output directory
"""
# read in mapping from split_library file
labels = imap(lambda a_b: a_b[0], parse_fasta(fasta_fh))
# mapping from seq_id to sample_id
sample_id_mapping = extract_read_to_sample_mapping(labels)
denoiser_mapping = read_denoiser_mapping(mapping_fh)
# read in cd_hit otu map
# and write out combined otu_picker+denoiser map
otu_fh = open(out_dir + "/denoised_otu_map.txt", "w")
for otu_line in otu_picker_otu_map_fh:
otu_split = otu_line.split()
otu = otu_split[0]
ids = otu_split[1:]
get_sample_id = sample_id_mapping.get
# concat lists
# make sure the biggest one is first for pick_repr
all_ids = sort_ids(ids, denoiser_mapping)
all_ids.extend(sum([denoiser_mapping[id] for id in ids], []))
try:
otu_fh.write("%s\t" % otu +
"\t".join(map(get_sample_id, all_ids)) + "\n")
except TypeError:
# get returns Null if denoiser_mapping id not present in
# sample_id_mapping
print "Found id in denoiser output, which was not found in split_libraries " +\
"output FASTA file. Wrong file?"
exit()
fasta_out_fh = open(out_dir + "/denoised_all.fasta", "w")
for label, seq in parse_fasta(denoised_seqs_fh):
id = label.split()[0]
newlabel = "%s %s" % (sample_id_mapping[id], id)
fasta_out_fh.write(BiologicalSequence(seq, id=newlabel).to_fasta())
def combine_mappings(fasta_fh, mapping_fh, denoised_seqs_fh,
otu_picker_otu_map_fh, out_dir):
"""Combine denoiser and OTU picker mapping file, replace flowgram IDs.
fasta_fh: a fasta file with labels as produced by Qiime's split_libraries.py
used to replace flowgram id with the unique se_sample_id
mapping_fh: The cluster mapping from the denoiser.py
denoised_seqs_fh: the Fasta output files from denoiser.py
otu_picker_map_fh: cluster map from otu picker on denoised_seqs_fh
out_dir: output directory
"""
# read in mapping from split_library file
labels = imap(lambda a_b: a_b[0], parse_fasta(fasta_fh))
# mapping from seq_id to sample_id
sample_id_mapping = extract_read_to_sample_mapping(labels)
denoiser_mapping = read_denoiser_mapping(mapping_fh)
# read in cd_hit otu map
# and write out combined otu_picker+denoiser map
otu_fh = open(out_dir + "/denoised_otu_map.txt", "w")
for otu_line in otu_picker_otu_map_fh:
otu_split = otu_line.split()
otu = otu_split[0]
ids = otu_split[1:]
get_sample_id = sample_id_mapping.get
# concat lists
# make sure the biggest one is first for pick_repr
all_ids = sort_ids(ids, denoiser_mapping)
all_ids.extend(sum([denoiser_mapping[id] for id in ids], []))
try:
otu_fh.write("%s\t" % otu +
"\t".join(map(get_sample_id, all_ids)) + "\n")
except TypeError:
# get returns Null if denoiser_mapping id not present in
# sample_id_mapping
print "Found id in denoiser output, which was not found in split_libraries " +\
"output FASTA file. Wrong file?"
exit()
fasta_out_fh = open(out_dir + "/denoised_all.fasta", "w")
for label, seq in parse_fasta(denoised_seqs_fh):
id = label.split()[0]
newlabel = "%s %s" % (sample_id_mapping[id], id)
fasta_out_fh.write(BiologicalSequence(seq, id=newlabel).to_fasta())
def test_call_write_to_file(self):
"""ReferenceRepSetPicker.__call__ otu map correctly written to file"""
app = ReferenceRepSetPicker(params={'Algorithm': 'first',
'ChoiceF': first_id})
app(self.tmp_seq_filepath,
self.tmp_otu_filepath,
self.ref_seq_filepath,
result_path=self.result_filepath)
with open(self.result_filepath) as f:
actual = SequenceCollection.from_fasta_records(parse_fasta(f), DNA)
expected = SequenceCollection.from_fasta_records(
parse_fasta(rep_seqs_reference_result_file_exp.split('\n')), DNA)
# we don't care about order in the results
self.assertEqual(set(actual), set(expected))
def check_fasta_seqs_lens(input_fasta_fp):
""" Creates bins of sequence lens
Useful for checking for valid aligned sequences.
input_fasta_fp: input fasta filepath
"""
seq_lens = defaultdict(int)
input_fasta_f = open(input_fasta_fp, "U")
for label, seq in parse_fasta(input_fasta_f):
seq_lens[len(seq)] += 1
input_fasta_f.close()
formatted_seq_lens = []
for curr_key in seq_lens:
formatted_seq_lens.append((seq_lens[curr_key], curr_key))
formatted_seq_lens.sort(reverse=True)
return formatted_seq_lens
def output_test(self, aligned_basename):
""" Test results of test_load_zip() and test_load_gzip()
"""
f_log = open(aligned_basename + ".log", "U")
f_log_str = f_log.read()
self.assertTrue("Total reads passing E-value threshold" in f_log_str)
self.assertTrue("Total reads for de novo clustering" in f_log_str)
self.assertTrue("Total OTUs" in f_log_str)
f_log.seek(0)
for line in f_log:
if line.startswith(" Total reads passing E-value threshold"):
num_hits = (re.split(
'Total reads passing E-value threshold = | \(',
line)[1]).strip()
elif line.startswith(" Total reads for de novo clustering"):
num_failures_log = (re.split(
'Total reads for de novo clustering = ', line)[1]).strip()
elif line.startswith(" Total OTUs"):
num_clusters_log = (re.split('Total OTUs = ', line)[1]).strip()
f_log.close()
# Correct number of reads mapped
self.assertEqual("99999", num_hits)
# Correct number of clusters recorded
self.assertEqual("272", num_clusters_log)
# Correct number of clusters in OTU-map
with open(aligned_basename + "_otus.txt", 'U') as f_otumap:
num_clusters_file = sum(1 for line in f_otumap)
self.assertEqual(272, num_clusters_file)
num_failures_file = 0
with open(aligned_basename + "_denovo.fasta", 'U') as f_denovo:
for label, seq in parse_fasta(f_denovo):
num_failures_file += 1
# Correct number of reads for de novo clustering
self.assertEqual(num_failures_log, str(num_failures_file))
def output_test(self, aligned_basename):
""" Test results of test_load_zip() and test_load_gzip()
"""
f_log = open(aligned_basename + ".log", "U")
f_log_str = f_log.read()
self.assertTrue("Total reads passing E-value threshold" in f_log_str)
self.assertTrue("Total reads for de novo clustering" in f_log_str)
self.assertTrue("Total OTUs" in f_log_str)
f_log.seek(0)
for line in f_log:
if line.startswith(" Total reads passing E-value threshold"):
num_hits = (re.split('Total reads passing E-value threshold = | \(', line)[1]).strip()
elif line.startswith(" Total reads for de novo clustering"):
num_failures_log = (re.split('Total reads for de novo clustering = ',
line)[1]).strip()
elif line.startswith(" Total OTUs"):
num_clusters_log = (re.split('Total OTUs = ', line)[1]).strip()
f_log.close()
# Correct number of reads mapped
self.assertEqual("99999", num_hits)
# Correct number of clusters recorded
self.assertEqual("272", num_clusters_log)
# Correct number of clusters in OTU-map
with open(aligned_basename + "_otus.txt", 'U') as f_otumap:
num_clusters_file = sum(1 for line in f_otumap)
self.assertEqual(272, num_clusters_file)
num_failures_file = 0
with open(aligned_basename + "_denovo.fasta", 'U') as f_denovo:
for label, seq in parse_fasta(f_denovo):
num_failures_file += 1
# Correct number of reads for de novo clustering
self.assertEqual(num_failures_log, str(num_failures_file))
def align_two_alignments(aln1, aln2, moltype, params=None):
"""Returns an Alignment object from two existing Alignments.
aln1, aln2: cogent.core.alignment.Alignment objects, or data that can be
used to build them.
- Mafft profile alignment only works with aligned sequences. Alignment
object used to handle unaligned sequences.
params: dict of parameters to pass in to the Mafft app controller.
"""
#create SequenceCollection object from seqs
aln1 = Alignment(aln1,MolType=moltype)
#Create mapping between abbreviated IDs and full IDs
aln1_int_map, aln1_int_keys = aln1.getIntMap()
#Create SequenceCollection from int_map.
aln1_int_map = Alignment(aln1_int_map,MolType=moltype)
#create Alignment object from aln
aln2 = Alignment(aln2,MolType=moltype)
#Create mapping between abbreviated IDs and full IDs
aln2_int_map, aln2_int_keys = aln2.getIntMap(prefix='seqn_')
#Create SequenceCollection from int_map.
aln2_int_map = Alignment(aln2_int_map,MolType=moltype)
#Update aln1_int_keys with aln2_int_keys
aln1_int_keys.update(aln2_int_keys)
#Create Mafft app.
app = Mafft(InputHandler='_input_as_paths',\
params=params,
SuppressStderr=False)
app._command = 'mafft-profile'
aln1_path = app._tempfile_as_multiline_string(aln1_int_map.toFasta())
aln2_path = app._tempfile_as_multiline_string(aln2_int_map.toFasta())
filepaths = [aln1_path,aln2_path]
#Get results using int_map as input to app
res = app(filepaths)
#Get alignment as dict out of results
alignment = dict(parse_fasta(res['StdOut']))
#Make new dict mapping original IDs
new_alignment = {}
for k,v in alignment.items():
key = k.replace('_seed_','')
new_alignment[aln1_int_keys[key]]=v
#Create an Alignment object from alignment dict
new_alignment = Alignment(new_alignment,MolType=moltype)
#Clean up
res.cleanUp()
remove(aln1_path)
remove(aln2_path)
remove('pre')
remove('trace')
del(aln1,aln1_int_map,aln1_int_keys,\
aln2,aln2_int_map,aln2_int_keys,app,res,alignment)
return new_alignment
def test_main(self):
"""Denoiser should always give same result on test data"""
expected = ">FS8APND01D3TW3 | cluster size: 94 \nCTCCCGTAGGAGTCTGGGCCGTATCTCAGTCCCAATGTGGCCGGTCACCCTCTCAGGCCGGCTACCCGTCAAAGCCTTGGTAAGCCACTACCCCACCAACAAGCTGATAAGCCGCGAGTCCATCCCCAACCGCCGAAACTTTCCAACCCCCACCATGCAGCAGGAGCTCCTATCCGGTATTAGCCCCAGTTTCCTGAAGTTATCCCAAAGTCAAGGGCAGGTTACTCACGTGTTACTCACCCGTTCGCC\n"
expected_map = """FS8APND01EWRS4:
FS8APND01DXG45:
FS8APND01D3TW3:\tFS8APND01CSXFN\tFS8APND01DQ8MX\tFS8APND01DY7QW\tFS8APND01B5QNI\tFS8APND01CQ6OG\tFS8APND01C7IGN\tFS8APND01DHSGH\tFS8APND01DJ17E\tFS8APND01CUXOA\tFS8APND01EUTYG\tFS8APND01EKK7T\tFS8APND01D582W\tFS8APND01B5GWU\tFS8APND01D7N2A\tFS8APND01BJGHZ\tFS8APND01D6DYZ\tFS8APND01C6ZIM\tFS8APND01D2X6Y\tFS8APND01BUYCE\tFS8APND01BNUEY\tFS8APND01DKLOE\tFS8APND01C24PP\tFS8APND01EBWQX\tFS8APND01ELDYW\tFS8APND01B0GCS\tFS8APND01D4QXI\tFS8APND01EMYD9\tFS8APND01EA2SK\tFS8APND01DZOSO\tFS8APND01DHYAZ\tFS8APND01C7UD9\tFS8APND01BTZFV\tFS8APND01CR78R\tFS8APND01B39IE\tFS8APND01ECVC0\tFS8APND01DM3PL\tFS8APND01DELWS\tFS8APND01CIEK8\tFS8APND01D7ZOZ\tFS8APND01CZSAI\tFS8APND01DYOVR\tFS8APND01BX9XY\tFS8APND01DEWJA\tFS8APND01BEKIW\tFS8APND01DCKB9\tFS8APND01EEYIS\tFS8APND01DDKEA\tFS8APND01DSZLO\tFS8APND01C6EBC\tFS8APND01EE15M\tFS8APND01ELO9B\tFS8APND01C58QY\tFS8APND01DONCG\tFS8APND01DVXX2\tFS8APND01BL5YT\tFS8APND01BIL2V\tFS8APND01EBSYQ\tFS8APND01CCX8R\tFS8APND01B2YCJ\tFS8APND01B1JG4\tFS8APND01DJ024\tFS8APND01BIJY0\tFS8APND01CIA4G\tFS8APND01DV74M\tFS8APND01ECAX5\tFS8APND01DC3TZ\tFS8APND01EJVO6\tFS8APND01D4VFG\tFS8APND01DYYYO\tFS8APND01D1EDD\tFS8APND01DQUOT\tFS8APND01A2NSJ\tFS8APND01DDC8I\tFS8APND01BP1T2\tFS8APND01DPY6U\tFS8APND01CIQGV\tFS8APND01BPUT8\tFS8APND01BDNH4\tFS8APND01DOZDN\tFS8APND01DS866\tFS8APND01DGS2J\tFS8APND01EDK32\tFS8APND01EPA0T\tFS8APND01CK3JM\tFS8APND01BKLWW\tFS8APND01DV0BO\tFS8APND01DPNXE\tFS8APND01B7LUA\tFS8APND01BTTE2\tFS8APND01CKO4X\tFS8APND01DGGBY\tFS8APND01C4NHX\tFS8APND01DYPQN
FS8APND01BSTVP:
FS8APND01EFK0W:
FS8APND01DCIOO:
FS8APND01CKOMZ:
"""
command = " ".join(["denoiser.py",
"--force", "-o", self.test_dir, "-i",
"%s/qiime/support_files/denoiser/TestData/denoiser_test_set.sff.txt" % PROJECT_HOME])
result = Popen(command, shell=True, universal_newlines=True,
stdout=PIPE, stderr=STDOUT).stdout.read()
self.result_dir = self.test_dir
observed = "".join(list(open(self.result_dir + "centroids.fasta")))
self.assertEqual(observed, expected)
self.assertEqual(
len(list(parse_fasta(open(self.result_dir + "singletons.fasta")))),
6)
observed = "".join(
list(open(self.result_dir + "denoiser_mapping.txt")))
self.assertEqual(observed, expected_map)
def setUp(self):
# create a list of files to cleanup
self._paths_to_clean_up = []
self._dirs_to_clean_up = []
# load query seqs
self.seqs = Alignment(parse_fasta(QUERY_SEQS.split()))
# generate temp filename
tmp_dir='/tmp'
self.outfile = get_tmp_filename(tmp_dir)
# create and write out reference sequence file
self.outfasta=splitext(self.outfile)[0]+'.fasta'
fastaout=open(self.outfasta,'w')
fastaout.write(REF_SEQS)
fastaout.close()
self._paths_to_clean_up.append(self.outfasta)
# create and write out starting tree file
self.outtree=splitext(self.outfile)[0]+'.tree'
treeout=open(self.outtree,'w')
treeout.write(REF_TREE)
treeout.close()
self._paths_to_clean_up.append(self.outtree)
def _split_along_prefix(self,
input_fp,
params,
jobs_to_start,
job_prefix,
output_dir):
""" Split input sequences into sets with identical prefix"""
out_files = []
buffered_handles = {}
prefix_length = params['prefix_length'] or 1
for seq_id, seq in parse_fasta(open(input_fp)):
if(len(seq) < prefix_length):
raise ValueError("Prefix length must be equal or longer than sequence.\n"
+ " Found seq %s with length %d" % (seq_id, len(seq)))
prefix = seq[:prefix_length]
if (prefix not in buffered_handles):
# never seen this prefix before
out_fp = "%s/%s%s" % (output_dir, job_prefix, prefix)
buffered_handles[prefix] = BufferedWriter(out_fp)
out_files.append(out_fp)
self.prefix_counts[prefix] = 0
self.prefix_counts[prefix] += 1
buffered_handles[prefix].write('>%s\n%s\n' % (seq_id, seq))
# make sure all buffers are closed and flushed
for buf_fh in buffered_handles.itervalues():
buf_fh.close()
remove_files = True
return out_files, remove_files
def _generate_training_files(self):
"""Returns a tuple of file objects suitable for passing to the
RdpTrainer application controller.
"""
tmp_dir = get_qiime_temp_dir()
training_set = RdpTrainingSet()
reference_seqs_file = open(self.Params['reference_sequences_fp'], 'U')
id_to_taxonomy_file = open(self.Params['id_to_taxonomy_fp'], 'U')
for seq_id, seq in parse_fasta(reference_seqs_file):
training_set.add_sequence(seq_id, seq)
for line in id_to_taxonomy_file:
seq_id, lineage_str = map(strip, line.split('\t'))
training_set.add_lineage(seq_id, lineage_str)
training_set.dereplicate_taxa()
rdp_taxonomy_file = NamedTemporaryFile(
prefix='RdpTaxonAssigner_taxonomy_', suffix='.txt', dir=tmp_dir)
rdp_taxonomy_file.write(training_set.get_rdp_taxonomy())
rdp_taxonomy_file.seek(0)
rdp_training_seqs_file = NamedTemporaryFile(
prefix='RdpTaxonAssigner_training_seqs_', suffix='.fasta',
dir=tmp_dir)
for rdp_id, seq in training_set.get_training_seqs():
rdp_training_seqs_file.write('>%s\n%s\n' % (rdp_id, seq))
rdp_training_seqs_file.seek(0)
self._training_set = training_set
return rdp_taxonomy_file, rdp_training_seqs_file
def seqs_from_file(ids, file_lines):
"""Extract labels and seqs from file"""
for label, seq in parse_fasta(file_lines):
if id_from_fasta_label_line(label) in ids:
yield label, seq
def test_dereplicate_seqs_remove_singletons(self):
""" Test dereplicate_seqs() method functionality with
removing singletons
"""
seqs = [("seq1", "TACCGGCAGCTCAAGTGATGACCGCTATTATTGGGCCTAAAGCGTCCG"),
("seq2", "TACCGGCAGCTCAAGTGATGACCGCTATTATTGGGCCTAAAGCGTCCG"),
("seq3", "TACCGGCAGCTCAAGTGATGACCGCTATTATTGGGCCTAAAGCGTCCG"),
("seq4", "TACCGGCAGCTCAAGTGATGACCGCTATTATTGGGCCTAAAGCGTCCT"),
("seq5", "TACCAGCCCCTTAAGTGGTAGGGACGATTATTTGGCCTAAAGCGTCCG"),
("seq6", "CTGCAAGGCTAGGGGGCGGGAGAGGCGGGTGGTACTTGAGGGGAGAAT"),
("seq7", "CTGCAAGGCTAGGGGGCGGGAGAGGCGGGTGGTACTTGAGGGGAGAAT")]
seqs_fp = join(self.working_dir, "seqs.fasta")
with open(seqs_fp, 'w') as seqs_f:
for seq in seqs:
seqs_f.write(">%s\n%s\n" % seq)
output_fp = join(self.working_dir, "seqs_derep.fasta")
log_fp = join(self.working_dir, "seqs_derep.log")
dereplicate_seqs(seqs_fp=seqs_fp,
output_fp=output_fp)
self.assertTrue(isfile(output_fp))
self.assertTrue(isfile(log_fp))
exp = [("seq1;size=3;",
"TACCGGCAGCTCAAGTGATGACCGCTATTATTGGGCCTAAAGCGTCCG"),
("seq6;size=2;",
"CTGCAAGGCTAGGGGGCGGGAGAGGCGGGTGGTACTTGAGGGGAGAAT")]
with open(output_fp, 'U') as out_f:
act = [item for item in parse_fasta(out_f)]
self.assertEqual(act, exp)
def split_sff(sff_file_handles, map_file_handle, outdir="/tmp/"):
"""Splits a sff.txt file on barcode/mapping file."""
try:
(flowgrams, header) = cat_sff_files(sff_file_handles)
except ValueError:
# reading in the binary sff usually shows up as ValueError
raise FileFormatError('Wrong flogram file format. Make sure you pass the sff.txt format ' +
'produced by sffinfo. The binary .sff will not work here.')
(inverse_map, map_count) = build_inverse_barcode_map(
parse_fasta(map_file_handle))
filenames = []
# we might have many barcodes and reach python open file limit
# therefor we go the slow way and open and close files each time
# First set up all files with the headers only
for barcode_id in map_count.keys():
fh = open(outdir + barcode_id, "w")
write_sff_header(header, fh, map_count[barcode_id])
fh.close()
filenames.append(outdir + barcode_id)
# Then direct each flowgram into its barcode file
for f in flowgrams:
if f.Name in inverse_map:
barcode_id = inverse_map[f.Name]
fh = open(outdir + barcode_id, "a")
fh.write(f.createFlowHeader() + "\n")
return filenames
def get_seqs_to_keep_lookup_from_sample_ids(fasta_f, sample_ids):
sample_ids = set(sample_ids)
seqs_to_keep = set()
for seq_id, seq in parse_fasta(fasta_f):
if seq_id.split('_')[0] in sample_ids:
seqs_to_keep.add(seq_id)
return {}.fromkeys(seqs_to_keep)
def sort_fasta_by_abundance(fasta_lines, fasta_out_f):
""" Sort seqs in fasta_line by abundance, write all seqs to fasta_out_f
Note that all sequences are written out, not just unique ones.
fasta_lines: input file handle (or similar object)
fasta_out_f: output file handle (or similar object)
** The current implementation works well for fairly large data sets,
(e.g., several combined 454 runs) but we may want to revisit if it
chokes on very large (e.g., Illumina) files. --Greg **
"""
seq_index = {}
count = 0
for seq_id, seq in parse_fasta(fasta_lines):
count += 1
try:
seq_index[seq].append(seq_id)
except KeyError:
seq_index[seq] = [seq_id]
seqs = []
for k, v in seq_index.items():
seqs.append((len(v), k, v))
del seq_index[k]
seqs.sort()
for count, seq, seq_ids in seqs[::-1]:
for seq_id in seq_ids:
fasta_out_f.write('>%s\n%s\n' % (seq_id, seq))
def filter_fasta(input_seqs_f, output_seqs_f, seqs_to_keep, negate=False,
seqid_f=None):
""" Write filtered input_seqs to output_seqs_f which contains only seqs_to_keep
input_seqs can be the output of parse_fasta or parse_fastq
"""
if seqid_f is None:
seqs_to_keep_lookup = {}.fromkeys([seq_id.split()[0]
for seq_id in seqs_to_keep])
# Define a function based on the value of negate
if not negate:
def keep_seq(seq_id):
return seq_id.split()[0] in seqs_to_keep_lookup
else:
def keep_seq(seq_id):
return seq_id.split()[0] not in seqs_to_keep_lookup
else:
if not negate:
keep_seq = seqid_f
else:
keep_seq = lambda x: not seqid_f(x)
for seq_id, seq in parse_fasta(input_seqs_f):
if keep_seq(seq_id):
output_seqs_f.write('>%s\n%s\n' % (seq_id, seq))
output_seqs_f.close()
def remove_outliers(seqs, num_stds, fraction_seqs_for_stats=.95):
""" remove sequences very different from the majority consensus
given aligned sequences, will:
1. calculate a majority consensus (most common symbol at each position
of the alignment);
2. compute the mean/std edit distance of each seq to the consensus;
3. discard sequences whose edit dist is greater than the cutoff, which is
defined as being `num_stds` greater than the mean.
"""
# load the alignment and compute the consensus sequence
aln = Alignment.from_fasta_records(parse_fasta(seqs), DNA)
consensus_seq = aln.majority_consensus()
# compute the hamming distance between all sequences in the alignment
# and the consensus sequence
dists_to_consensus = [s.distance(consensus_seq) for s in aln]
# compute the average and standard deviation distance from the consensus
average_distance = mean(dists_to_consensus)
std_distance = std(dists_to_consensus)
# compute the distance cutoff
dist_cutoff = average_distance + num_stds * std_distance
# for all sequences, determine if they're distance to the consensus
# is less then or equal to the cutoff distance. if so, add the sequence's
# identifier to the list of sequence identifiers to keep
seqs_to_keep = []
for seq_id, dist_to_consensus in izip(aln.ids(), dists_to_consensus):
if dist_to_consensus <= dist_cutoff:
seqs_to_keep.append(seq_id)
# filter the alignment to only keep the sequences identified in the step
# above
filtered_aln = aln.subalignment(seqs_to_keep=seqs_to_keep)
# and return the filtered alignment
return filtered_aln
def generate_lane_mask(infile, entropy_threshold, existing_mask=None):
""" Generates lane mask dynamically by calculating base frequencies
infile: open file object for aligned fasta file
entropy_threshold: float value that designates the percentage of entropic
positions to be removed, i.e., 0.10 means the 10% most entropic positions
are removed.
"""
aln = Alignment.from_fasta_records(parse_fasta(infile), DNA)
uncertainty = aln.position_entropies(nan_on_non_standard_chars=False)
uncertainty_sorted = sorted(uncertainty)
cutoff_index = int(
round((len(uncertainty_sorted) - 1) * (1 - entropy_threshold)))
max_uncertainty = uncertainty_sorted[cutoff_index]
# This correction is for small datasets with a small possible number of
# uncertainty values.
highest_certainty = min(uncertainty_sorted)
lane_mask = ""
for base in uncertainty:
if base >= max_uncertainty and base != highest_certainty:
lane_mask += "0"
else:
lane_mask += "1"
return lane_mask
def truncate_rev_primers(fasta_f,
output_fp,
reverse_primers,
truncate_option='truncate_only',
primer_mismatches=2):
""" Locally aligns reverse primers, trucates or removes seqs
fasta_f: open file of fasta file
output_fp: open filepath to write truncated fasta to
reverse_primers: dictionary of SampleID:reverse primer sequence
truncate_option: either truncate_only, truncate_remove
primer_mismatches: number of allowed primer mismatches
"""
log_data = {
'sample_id_not_found': 0,
'reverse_primer_not_found': 0,
'total_seqs': 0,
'seqs_written': 0
}
for label, seq in parse_fasta(fasta_f):
curr_label = label.split('_')[0]
log_data['total_seqs'] += 1
# Check fasta label for valid SampleID, if not found, just write seq
try:
curr_rev_primer = reverse_primers[curr_label]
except KeyError:
log_data['sample_id_not_found'] += 1
output_fp.write('>%s\n%s\n' % (label, seq))
log_data['seqs_written'] += 1
continue
mm_tests = {}
for rev_primer in curr_rev_primer:
rev_primer_mm, rev_primer_index =\
local_align_primer_seq(rev_primer, seq)
mm_tests[rev_primer_mm] = rev_primer_index
rev_primer_mm = min(mm_tests.keys())
rev_primer_index = mm_tests[rev_primer_mm]
if rev_primer_mm > primer_mismatches:
if truncate_option == "truncate_remove":
log_data['reverse_primer_not_found'] += 1
else:
log_data['reverse_primer_not_found'] += 1
log_data['seqs_written'] += 1
output_fp.write('>%s\n%s\n' % (label, seq))
else:
# Check for zero seq length after truncation, will not write seq
if rev_primer_index > 0:
log_data['seqs_written'] += 1
output_fp.write('>%s\n%s\n' % (label, seq[0:rev_primer_index]))
return log_data
def _generate_training_files(self):
"""Returns a tuple of file objects suitable for passing to the
RdpTrainer application controller.
"""
tmp_dir = get_qiime_temp_dir()
training_set = RdpTrainingSet()
reference_seqs_file = open(self.Params['reference_sequences_fp'], 'U')
id_to_taxonomy_file = open(self.Params['id_to_taxonomy_fp'], 'U')
for seq_id, seq in parse_fasta(reference_seqs_file):
training_set.add_sequence(seq_id, seq)
for line in id_to_taxonomy_file:
seq_id, lineage_str = map(strip, line.split('\t'))
training_set.add_lineage(seq_id, lineage_str)
training_set.dereplicate_taxa()
rdp_taxonomy_file = NamedTemporaryFile(
prefix='RdpTaxonAssigner_taxonomy_', suffix='.txt', dir=tmp_dir)
rdp_taxonomy_file.write(training_set.get_rdp_taxonomy())
rdp_taxonomy_file.seek(0)
rdp_training_seqs_file = NamedTemporaryFile(
prefix='RdpTaxonAssigner_training_seqs_',
suffix='.fasta',
dir=tmp_dir)
for rdp_id, seq in training_set.get_training_seqs():
rdp_training_seqs_file.write('>%s\n%s\n' % (rdp_id, seq))
rdp_training_seqs_file.seek(0)
self._training_set = training_set
return rdp_taxonomy_file, rdp_training_seqs_file
def check_fasta_seqs_lens(input_fasta_fp):
""" Creates bins of sequence lens
Useful for checking for valid aligned sequences.
input_fasta_fp: input fasta filepath
"""
seq_lens = defaultdict(int)
input_fasta_f = open(input_fasta_fp, "U")
for label, seq in parse_fasta(input_fasta_f):
seq_lens[len(seq)] += 1
input_fasta_f.close()
formatted_seq_lens = []
for curr_key in seq_lens:
formatted_seq_lens.append((seq_lens[curr_key], curr_key))
formatted_seq_lens.sort(reverse=True)
return formatted_seq_lens
def seqs_from_file(ids, file_lines):
"""Extract labels and seqs from file"""
for label, seq in parse_fasta(file_lines):
if id_from_fasta_label_line(label) in ids:
yield label, seq
def truncate_rev_primers(fasta_f,
output_fp,
reverse_primers,
truncate_option='truncate_only',
primer_mismatches=2):
""" Locally aligns reverse primers, trucates or removes seqs
fasta_f: open file of fasta file
output_fp: open filepath to write truncated fasta to
reverse_primers: dictionary of SampleID:reverse primer sequence
truncate_option: either truncate_only, truncate_remove
primer_mismatches: number of allowed primer mismatches
"""
log_data = {
'sample_id_not_found': 0,
'reverse_primer_not_found': 0,
'total_seqs': 0,
'seqs_written': 0
}
for label, seq in parse_fasta(fasta_f):
curr_label = label.split('_')[0]
log_data['total_seqs'] += 1
# Check fasta label for valid SampleID, if not found, just write seq
try:
curr_rev_primer = reverse_primers[curr_label]
except KeyError:
log_data['sample_id_not_found'] += 1
output_fp.write('>%s\n%s\n' % (label, seq))
log_data['seqs_written'] += 1
continue
mm_tests = {}
for rev_primer in curr_rev_primer:
rev_primer_mm, rev_primer_index =\
local_align_primer_seq(rev_primer, seq)
mm_tests[rev_primer_mm] = rev_primer_index
rev_primer_mm = min(mm_tests.keys())
rev_primer_index = mm_tests[rev_primer_mm]
if rev_primer_mm > primer_mismatches:
if truncate_option == "truncate_remove":
log_data['reverse_primer_not_found'] += 1
else:
log_data['reverse_primer_not_found'] += 1
log_data['seqs_written'] += 1
output_fp.write('>%s\n%s\n' % (label, seq))
else:
# Check for zero seq length after truncation, will not write seq
if rev_primer_index > 0:
log_data['seqs_written'] += 1
output_fp.write('>%s\n%s\n' % (label, seq[0:rev_primer_index]))
return log_data
def getResult(self, aln_path, *args, **kwargs):
"""Returns alignment from sequences.
Currently does not allow parameter tuning of program and uses
default parameters -- this is bad and should be fixed.
#TODO: allow command-line access to important aln params.
"""
module = self.Params['Module']
# standard qiime says we just consider the first word as the unique ID
# the rest of the defline of the fasta alignment often doesn't match
# the otu names in the otu table
with open(aln_path) as aln_f:
seqs = Alignment.from_fasta_records(
parse_fasta(aln_f, label_to_name=lambda x: x.split()[0]),
DNA)
# This ugly little line of code lets us pass a skbio Alignment when a
# a cogent alignment is expected.
seqs.getIntMap = seqs.int_map
result = module.build_tree_from_alignment(seqs, moltype=DNA_cogent)
try:
root_method = kwargs['root_method']
if root_method == 'midpoint':
result = root_midpt(result)
elif root_method == 'tree_method_default':
pass
except KeyError:
pass
return result
def test_dereplicate_seqs_remove_singletons(self):
""" Test dereplicate_seqs() method functionality with
removing singletons
"""
seqs = [("seq1", "TACCGGCAGCTCAAGTGATGACCGCTATTATTGGGCCTAAAGCGTCCG"),
("seq2", "TACCGGCAGCTCAAGTGATGACCGCTATTATTGGGCCTAAAGCGTCCG"),
("seq3", "TACCGGCAGCTCAAGTGATGACCGCTATTATTGGGCCTAAAGCGTCCG"),
("seq4", "TACCGGCAGCTCAAGTGATGACCGCTATTATTGGGCCTAAAGCGTCCT"),
("seq5", "TACCAGCCCCTTAAGTGGTAGGGACGATTATTTGGCCTAAAGCGTCCG"),
("seq6", "CTGCAAGGCTAGGGGGCGGGAGAGGCGGGTGGTACTTGAGGGGAGAAT"),
("seq7", "CTGCAAGGCTAGGGGGCGGGAGAGGCGGGTGGTACTTGAGGGGAGAAT")]
seqs_fp = join(self.working_dir, "seqs.fasta")
with open(seqs_fp, 'w') as seqs_f:
for seq in seqs:
seqs_f.write(">%s\n%s\n" % seq)
output_fp = join(self.working_dir, "seqs_derep.fasta")
log_fp = join(self.working_dir, "seqs_derep.log")
dereplicate_seqs(seqs_fp=seqs_fp, output_fp=output_fp)
self.assertTrue(isfile(output_fp))
self.assertTrue(isfile(log_fp))
exp = [("seq1;size=3;",
"TACCGGCAGCTCAAGTGATGACCGCTATTATTGGGCCTAAAGCGTCCG"),
("seq6;size=2;",
"CTGCAAGGCTAGGGGGCGGGAGAGGCGGGTGGTACTTGAGGGGAGAAT")]
with open(output_fp, 'U') as out_f:
act = [item for item in parse_fasta(out_f)]
self.assertEqual(act, exp)
def test_call_write_to_file(self):
"""ReferenceRepSetPicker.__call__ otu map correctly written to file"""
app = ReferenceRepSetPicker(params={
'Algorithm': 'first',
'ChoiceF': first_id
})
app(self.tmp_seq_filepath,
self.tmp_otu_filepath,
self.ref_seq_filepath,
result_path=self.result_filepath)
with open(self.result_filepath) as f:
actual = SequenceCollection.from_fasta_records(parse_fasta(f), DNA)
expected = SequenceCollection.from_fasta_records(
parse_fasta(rep_seqs_reference_result_file_exp.split('\n')), DNA)
# we don't care about order in the results
self.assertEqual(set(actual), set(expected))
def setUp(self):
fd, self.infernal_test1_input_fp = mkstemp(prefix="InfernalAlignerTests_", suffix=".fasta")
close(fd)
with open(self.infernal_test1_input_fp, "w") as in_f:
in_f.write("\n".join(infernal_test1_input_fasta))
fd, self.infernal_test1_template_fp = mkstemp(prefix="InfernalAlignerTests_", suffix="template.sto")
close(fd)
with open(self.infernal_test1_template_fp, "w") as in_f:
in_f.write(infernal_test1_template_stockholm)
# create temp file names (and touch them so we can reliably
# clean them up)
fd, self.result_fp = mkstemp(prefix="InfernalAlignerTests_", suffix=".fasta")
close(fd)
open(self.result_fp, "w").close()
fd, self.log_fp = mkstemp(prefix="InfernalAlignerTests_", suffix=".log")
close(fd)
open(self.log_fp, "w").close()
self._paths_to_clean_up = [
self.infernal_test1_input_fp,
self.result_fp,
self.log_fp,
self.infernal_test1_template_fp,
]
self.infernal_test1_aligner = InfernalAligner({"template_filepath": self.infernal_test1_template_fp})
self.infernal_test1_expected_aln = Alignment.from_fasta_records(
parse_fasta(infernal_test1_expected_alignment), DNA
)
def split_sff(sff_file_handles, map_file_handle, outdir="/tmp/"):
"""Splits a sff.txt file on barcode/mapping file."""
try:
(flowgrams, header) = cat_sff_files(sff_file_handles)
except ValueError:
# reading in the binary sff usually shows up as ValueError
raise FileFormatError(
'Wrong flogram file format. Make sure you pass the sff.txt format '
+ 'produced by sffinfo. The binary .sff will not work here.')
(inverse_map,
map_count) = build_inverse_barcode_map(parse_fasta(map_file_handle))
filenames = []
# we might have many barcodes and reach python open file limit
# therefor we go the slow way and open and close files each time
# First set up all files with the headers only
for barcode_id in map_count.keys():
fh = open(outdir + barcode_id, "w")
write_sff_header(header, fh, map_count[barcode_id])
fh.close()
filenames.append(outdir + barcode_id)
# Then direct each flowgram into its barcode file
for f in flowgrams:
if f.Name in inverse_map:
barcode_id = inverse_map[f.Name]
fh = open(outdir + barcode_id, "a")
fh.write(f.createFlowHeader() + "\n")
return filenames
def generate_lane_mask(infile, entropy_threshold, existing_mask=None):
""" Generates lane mask dynamically by calculating base frequencies
infile: open file object for aligned fasta file
entropy_threshold: float value that designates the percentage of entropic
positions to be removed, i.e., 0.10 means the 10% most entropic positions
are removed.
"""
aln = Alignment.from_fasta_records(parse_fasta(infile), DNA)
uncertainty = aln.position_entropies(nan_on_non_standard_chars=False)
uncertainty_sorted = sorted(uncertainty)
cutoff_index = int(round((len(uncertainty_sorted) - 1) *
(1 - entropy_threshold)))
max_uncertainty = uncertainty_sorted[cutoff_index]
# This correction is for small datasets with a small possible number of
# uncertainty values.
highest_certainty = min(uncertainty_sorted)
lane_mask = ""
for base in uncertainty:
if base >= max_uncertainty and base != highest_certainty:
lane_mask += "0"
else:
lane_mask += "1"
return lane_mask
def get_seqs_to_keep_lookup_from_sample_ids(fasta_f, sample_ids):
sample_ids = set(sample_ids)
seqs_to_keep = set()
for seq_id, seq in parse_fasta(fasta_f):
if seq_id.split('_')[0] in sample_ids:
seqs_to_keep.add(seq_id)
return {}.fromkeys(seqs_to_keep)
def filter_fasta(input_seqs_f,
output_seqs_f,
seqs_to_keep,
negate=False,
seqid_f=None):
""" Write filtered input_seqs to output_seqs_f which contains only seqs_to_keep
input_seqs can be the output of parse_fasta or parse_fastq
"""
if seqid_f is None:
seqs_to_keep_lookup = {}.fromkeys(
[seq_id.split()[0] for seq_id in seqs_to_keep])
# Define a function based on the value of negate
if not negate:
def keep_seq(seq_id):
return seq_id.split()[0] in seqs_to_keep_lookup
else:
def keep_seq(seq_id):
return seq_id.split()[0] not in seqs_to_keep_lookup
else:
if not negate:
keep_seq = seqid_f
else:
keep_seq = lambda x: not seqid_f(x)
for seq_id, seq in parse_fasta(input_seqs_f):
if keep_seq(seq_id):
output_seqs_f.write('>%s\n%s\n' % (seq_id, seq))
output_seqs_f.close()
def remove_outliers(seqs, num_stds, fraction_seqs_for_stats=.95):
""" remove sequences very different from the majority consensus
given aligned sequences, will:
1. calculate a majority consensus (most common symbol at each position
of the alignment);
2. compute the mean/std edit distance of each seq to the consensus;
3. discard sequences whose edit dist is greater than the cutoff, which is
defined as being `num_stds` greater than the mean.
"""
# load the alignment and compute the consensus sequence
aln = Alignment.from_fasta_records(parse_fasta(seqs), DNA)
consensus_seq = aln.majority_consensus()
# compute the hamming distance between all sequences in the alignment
# and the consensus sequence
dists_to_consensus = [s.distance(consensus_seq) for s in aln]
# compute the average and standard deviation distance from the consensus
average_distance = mean(dists_to_consensus)
std_distance = std(dists_to_consensus)
# compute the distance cutoff
dist_cutoff = average_distance + num_stds * std_distance
# for all sequences, determine if they're distance to the consensus
# is less then or equal to the cutoff distance. if so, add the sequence's
# identifier to the list of sequence identifiers to keep
seqs_to_keep = []
for seq_id, dist_to_consensus in izip(aln.ids(), dists_to_consensus):
if dist_to_consensus <= dist_cutoff:
seqs_to_keep.append(seq_id)
# filter the alignment to only keep the sequences identified in the step
# above
filtered_aln = aln.subalignment(seqs_to_keep=seqs_to_keep)
# and return the filtered alignment
return filtered_aln
def get_seqs_act_split_sequence_on_sample_ids(self, output_dir):
"""Parse output of split_sequence_file_on_sample_ids_to_files()
Parameters
----------
output_dir: string
output directory path storing FASTA files
Returns
-------
seqs_act: dict
dictionary with keys being sample IDs and values list of
sequences belonging to sample ID
"""
seqs_act = {}
for fn in listdir(output_dir):
input_fp = join(output_dir, fn)
sample_file = splitext(fn)[0]
with open(input_fp, 'U') as input_f:
for label, seq in parse_fasta(input_f):
sample = label.split('_')[0]
self.assertEqual(sample_file, sample)
if sample not in seqs_act:
seqs_act[sample] = [(label, seq)]
else:
seqs_act[sample].append((label, seq))
return seqs_act
def sort_fasta_by_abundance(fasta_lines, fasta_out_f):
""" Sort seqs in fasta_line by abundance, write all seqs to fasta_out_f
Note that all sequences are written out, not just unique ones.
fasta_lines: input file handle (or similar object)
fasta_out_f: output file handle (or similar object)
** The current implementation works well for fairly large data sets,
(e.g., several combined 454 runs) but we may want to revisit if it
chokes on very large (e.g., Illumina) files. --Greg **
"""
seq_index = {}
count = 0
for seq_id, seq in parse_fasta(fasta_lines):
count += 1
try:
seq_index[seq].append(seq_id)
except KeyError:
seq_index[seq] = [seq_id]
seqs = []
for k, v in seq_index.items():
seqs.append((len(v), k, v))
del seq_index[k]
seqs.sort()
for count, seq, seq_ids in seqs[::-1]:
for seq_id in seq_ids:
fasta_out_f.write('>%s\n%s\n' % (seq_id, seq))
def getResult(self, aln_path, *args, **kwargs):
"""Returns alignment from sequences.
Currently does not allow parameter tuning of program and uses
default parameters -- this is bad and should be fixed.
#TODO: allow command-line access to important aln params.
"""
module = self.Params['Module']
# standard qiime says we just consider the first word as the unique ID
# the rest of the defline of the fasta alignment often doesn't match
# the otu names in the otu table
with open(aln_path) as aln_f:
seqs = Alignment.from_fasta_records(
parse_fasta(aln_f, label_to_name=lambda x: x.split()[0]), DNA)
# This ugly little line of code lets us pass a skbio Alignment when a
# a cogent alignment is expected.
seqs.getIntMap = seqs.int_map
result = module.build_tree_from_alignment(seqs, moltype=DNA_cogent)
try:
root_method = kwargs['root_method']
if root_method == 'midpoint':
result = root_midpt(result)
elif root_method == 'tree_method_default':
pass
except KeyError:
pass
return result
def _split_along_prefix(self, input_fp, params, jobs_to_start, job_prefix,
output_dir):
""" Split input sequences into sets with identical prefix"""
out_files = []
buffered_handles = {}
prefix_length = params['prefix_length'] or 1
for seq_id, seq in parse_fasta(open(input_fp)):
if (len(seq) < prefix_length):
raise ValueError(
"Prefix length must be equal or longer than sequence.\n" +
" Found seq %s with length %d" % (seq_id, len(seq)))
prefix = seq[:prefix_length]
if (prefix not in buffered_handles):
# never seen this prefix before
out_fp = "%s/%s%s" % (output_dir, job_prefix, prefix)
buffered_handles[prefix] = BufferedWriter(out_fp)
out_files.append(out_fp)
self.prefix_counts[prefix] = 0
self.prefix_counts[prefix] += 1
buffered_handles[prefix].write('>%s\n%s\n' % (seq_id, seq))
# make sure all buffers are closed and flushed
for buf_fh in buffered_handles.itervalues():
buf_fh.close()
remove_files = True
return out_files, remove_files
def rc_fasta_lines(fasta_lines, seq_desc_mapper=append_rc):
"""
"""
for seq_id, seq in parse_fasta(fasta_lines):
seq_id = seq_desc_mapper(seq_id)
seq = str(DNA(seq.upper()).rc())
yield seq_id, seq
return
def main():
option_parser, opts, args =\
parse_command_line_parameters(**script_info)
split_fasta_on_sample_ids_to_files(
parse_fasta(open(opts.input_fasta_fp, 'U')),
opts.output_dir,
opts.buffer_size)
def test_longest_id(self):
"""longest_id should return id associated with longest seq"""
ids = \
"R27DLI_4812 R27DLI_600 R27DLI_727 U1PLI_403 U1PLI_8969".split(
)
seqs = dict(
parse_fasta(dna_seqs.splitlines(), label_to_name=label_to_name))
self.assertEqual(longest_id(ids, seqs), 'U1PLI_403')
def test_store_cluster(self):
"""store_clusters stores the centroid seqs for each cluster."""
self.tmpdir = get_tmp_filename(tmp_dir="./", suffix="_store_clusters/")
create_dir(self.tmpdir)
self.files_to_remove.append(self.tmpdir + "singletons.fasta")
self.files_to_remove.append(self.tmpdir + "centroids.fasta")
# empty map results in empty files
store_clusters({}, self.tiny_test, self.tmpdir)
actual_centroids = list(
parse_fasta(open(self.tmpdir + "centroids.fasta")))
self.assertEqual(actual_centroids, [])
actual_singletons = list(
parse_fasta(open(self.tmpdir + "singletons.fasta")))
self.assertEqual(actual_singletons, [])
# non-empty map creates non-empty files, centroids sorted by size
mapping = {
'FZTHQMS01B8T1H': [],
'FZTHQMS01DE1KN': ['FZTHQMS01EHAJG'],
'FZTHQMS01EHAJG': [1, 2, 3]
} # content doesn't really matter
centroids = [
('FZTHQMS01EHAJG | cluster size: 4',
'CATGCTGCCTCCCGTAGGAGTTTGGACCGTGTCTCAGTTCCAATGTGGGGGACCTTCCTCTCAGAACCCCTATCCATCGAAGGTTTGGTGAGCCGTTACCTCACCAACTGCCTAATGGAACGCATCCCCATCGATAACCGAAATTCTTTAATAACAAGACCATGCGGTCTGATTATACCATCGGGTATTAATCTTTCTTTCGAAAGGCTATCCCCGAGTTATCGGCAGGTTGGATACGTGTTACTCACCCGTGCGCCGGTCGCCA'
),
('FZTHQMS01DE1KN | cluster size: 2',
'CATGCTGCCTCCCGTAGGAGTTTGGACCGTGTCTCAGTTCCAATGTGGGGGACCTTCCTCTCAGAACCCCTATCCATCGAAGGTTTGGTGAGCCGTTACCTCACCAACTGCCTAATGGAACGCATCCCCATCGATAACCGAAATTCTTTAATAACAAGACCATGCGGTCTGATTATACCATCGGGTATTAATCTTTCTTTCGAAAGGCTATCCCCGAGTTATCGGCAGGTTGGATACGTGTTACTCACCCGTGCGCCGGTCGCCA'
)
]
singletons = [(
'FZTHQMS01B8T1H',
'CATGCTGCCTCCCGTAGGAGTTTGGACCGTGTCTCAGTTCCAATGTGGGGGACCTTCCTCTCAGAACCCCTATCCATCGAAGGTTTGGTGAGCCGTTACCTCACCAACTGCCTAATGGAACGCATCCCCATCGATAACCGAAATTCTTTAATAATTAAACCATGCGGTTTTATTATACCATCGGGTATTAATCTTTCTTTCGAAAGGCTATCCCCGAGTTATCGGCAGGTTGGATACGTGTTACTCACCCGTGCGCCGGTCGCCATCACTTA'
)]
store_clusters(mapping, self.tiny_test, self.tmpdir)
actual_centroids = list(
parse_fasta(open(self.tmpdir + "centroids.fasta")))
self.assertEqual(actual_centroids, centroids)
actual_singletons = list(
parse_fasta(open(self.tmpdir + "singletons.fasta")))
self.assertEqual(actual_singletons, singletons)
