class SegCheck(unittest.TestCase):
mMasker = Masker.MaskerSeg()
def testEmpty(self):
"""test empty input."""
self.assertEqual(self.mMasker(""), "")
def testProtein(self):
"""test protein input."""
self.assertEqual(
self.mMasker("ACDEFGHIKLWWWWWWWWWWWWWWwwwwwwwwwwwacdefghikl"),
"ACDEFGHIKLXXXXXXXXXXXXXXxxxxxxxxxxxacdefghikl")
def testCoding(self):
"""test coding sequence input."""
self.assertEqual(
self.mMasker("GCCTGCGACGAGTTCGGCCACATCAAGCT"
"GTGGTGGTGGTGGTGGTGGTGGTGGTGGT"
"GGTGGTGGTGGTGGTGGTGGTGGTGGTGG"
"tggtggtggtggtggtgggcctgcgacga"
"gttcggccacatcaagctg"),
"GCCTGCGACGAGTTCGGCCACATCAAGCT"
"GNNNNNNNNNNNNNNNNNNNNNNNNNNNN"
"NNNNNNNNNNNNNNNNNNNNNNNNNNNNN"
"nnnnnnnnnnnnnnnnnngcctgcgacga"
"gttcggccacatcaagctg")
def maskSequences(sequences, masker=None):
'''return a list of masked sequence.
*masker* can be one of
dust/dustmasker * run dustmasker on sequences
softmask * use softmask to hardmask sequences
'''
if masker in ("dust", "dustmasker"):
masker_object = Masker.MaskerDustMasker()
else:
masker_object = None
if masker == "softmask":
# the genome sequence is repeat soft-masked
masked_seq = sequences
elif masker in ("dust", "dustmasker"):
# run dust
masked_seq = masker_object.maskSequences(
[x.upper() for x in sequences])
elif masker is None:
masked_seq = [x.upper() for x in sequences]
else:
raise ValueError("unknown masker %s" % masker)
# hard mask softmasked characters
masked_seq = [re.sub("[a-z]", "N", x) for x in masked_seq]
return masked_seq
def maskMali(mali, method="seg"):
"""mask multiple alignment according to an external masker.
"""
if method == "seg":
masker = Masker.MaskerSeg()
elif method == "bias":
masker = Masker.MaskerBias()
elif method == "random":
masker = Masker.MaskerRandom()
if mali.getAlphabet() == "na" and method in ("seg", "bias"):
for id, s in mali.items():
ss = Genomics.TranslateDNA2Protein(s.mString)
mss = masker(ss)
columns = []
for x in range(0, len(mss)):
if mss[x] in ("X", "x"):
columns += range(x, x + 3)
mali.getEntry(id).maskColumns(columns)
else:
for id, s in mali.items():
mali[id].mString = masker(s.mString)
def maskSequences(sequences, masker):
if masker == "repeatmasker":
# the genome sequence is repeat masked
masked_seq = sequences
elif masker == "dust":
masker_object = Masker.MaskerDustMasker()
masked_seq = [masker_object(x.upper()) for x in sequences]
else:
masked_seq = [x.upper() for x in sequences]
# hard mask softmasked characters
masked_seq = [re.sub("[a-z]", "N", x) for x in masked_seq]
return masked_seq
def main(argv=None):
if argv is None:
argv = sys.argv
parser = E.OptionParser(
version="%prog version: $Id$",
usage=globals()["__doc__"])
parser.add_option("-g", "--genome-file", dest="genome_file", type="string",
help="filename with genomic sequence to retrieve "
"sequences from.")
parser.add_option("-m", "--masker", dest="masker", type="choice",
choices=("dust", "dustmasker", "softmask", "none"),
help="apply masker to mask output sequences "
"[%default].")
parser.add_option("--output-mode", dest="output_mode", type="choice",
choices=("intervals", "leftright", "segments"),
help="what to output. "
"'intervals' generates a single sequence for "
"each bed interval. 'leftright' generates two "
"sequences, one in each direction, for each bed "
"interval. 'segments' can be used to output "
"sequence from bed12 files so that sequence only covers "
"the segements [%default]")
parser.add_option("--min-sequence-length", dest="min_length", type="int",
help="require a minimum sequence length [%default]")
parser.add_option("--max-sequence-length", dest="max_length", type="int",
help="require a maximum sequence length [%default]")
parser.add_option(
"--extend-at", dest="extend_at", type="choice",
choices=("none", "3", "5", "both", "3only", "5only"),
help="extend at 3', 5' or both or no ends. If 3only or 5only "
"are set, only the added sequence is returned [default=%default]")
parser.add_option(
"--extend-by", dest="extend_by", type="int",
help="extend by # bases [default=%default]")
parser.add_option(
"--use-strand", dest="ignore_strand",
action="store_false",
help="use strand information and return reverse complement "
"on intervals located on the negative strand. "
"[default=%default]")
parser.set_defaults(
genome_file=None,
masker=None,
output_mode="intervals",
min_length=0,
max_length=0,
extend_at=None,
extend_by=100,
ignore_strand=True,
)
(options, args) = E.Start(parser)
if options.genome_file:
fasta = IndexedFasta.IndexedFasta(options.genome_file)
contigs = fasta.getContigSizes()
fasta.setConverter(IndexedFasta.getConverter("zero-both-open"))
counter = E.Counter()
ids, seqs = [], []
E.info("collecting sequences")
for bed in Bed.setName(Bed.iterator(options.stdin)):
counter.input += 1
lcontig = fasta.getLength(bed.contig)
if options.ignore_strand:
strand = "+"
else:
strand = bed.strand
if options.output_mode == "segments" and bed.columns == 12:
ids.append("%s %s:%i..%i (%s) %s %s" %
(bed.name, bed.contig, bed.start, bed.end, strand,
bed["blockSizes"], bed["blockStarts"]))
seg_seqs = [fasta.getSequence(bed.contig, strand, start, end)
for start, end in bed.toIntervals()]
seqs.append("".join(seg_seqs))
elif (options.output_mode == "intervals" or
options.output_mode == "segments"):
ids.append("%s %s:%i..%i (%s)" %
(bed.name, bed.contig, bed.start, bed.end, strand))
seqs.append(
fasta.getSequence(bed.contig, strand, bed.start, bed.end))
elif options.output_mode == "leftright":
l = bed.end - bed.start
start, end = max(0, bed.start - l), bed.end - l
ids.append("%s_l %s:%i..%i (%s)" %
(bed.name, bed.contig, start, end, strand))
seqs.append(fasta.getSequence(bed.contig, strand, start, end))
start, end = bed.start + l, min(lcontig, bed.end + l)
ids.append("%s_r %s:%i..%i (%s)" %
(bed.name, bed.contig, start, end, strand))
seqs.append(fasta.getSequence(bed.contig, strand, start, end))
E.info("collected %i sequences" % len(seqs))
masked = Masker.maskSequences(seqs, options.masker)
options.stdout.write(
"\n".join([">%s\n%s" % (x, y) for x, y in zip(ids, masked)]) + "\n")
E.info("masked %i sequences" % len(seqs))
counter.output = len(seqs)
E.info("%s" % counter)
E.Stop()
def main(argv=None):
"""script main.
parses command line options in sys.argv, unless *argv* is given.
"""
if argv is None:
argv = sys.argv
parser = E.OptionParser(version="%prog version: $Id$",
usage=globals()["__doc__"])
parser.add_option("--is-gtf",
dest="is_gtf",
action="store_true",
help="input is gtf instead of gff.")
parser.add_option("-g",
"--genome-file",
dest="genome_file",
type="string",
help="filename with genome [default=%default].")
parser.add_option("-m",
"--merge-adjacent",
dest="merge",
action="store_true",
help="merge adjacent intervals with the same attributes."
" [default=%default]")
parser.add_option("-e",
"--feature",
dest="feature",
type="string",
help="filter by a feature, for example 'exon', 'CDS'."
" If set to the empty string, all entries are output "
"[%default].")
parser.add_option("-f",
"--maskregions-bed-file",
dest="filename_masks",
type="string",
metavar="gff",
help="mask sequences with regions given in gff file "
"[%default].")
parser.add_option("--remove-masked-regions",
dest="remove_masked_regions",
action="store_true",
help="remove regions instead of masking [%default].")
parser.add_option("--min-interval-length",
dest="min_length",
type="int",
help="set minimum length for sequences output "
"[%default]")
parser.add_option("--max-length",
dest="max_length",
type="int",
help="set maximum length for sequences output "
"[%default]")
parser.add_option("--extend-at",
dest="extend_at",
type="choice",
choices=("none", "3", "5", "both", "3only", "5only"),
help="extend at no end, 3', 5' or both ends. If "
"3only or 5only are set, only the added sequence "
"is returned [default=%default]")
parser.add_option("--extend-by",
dest="extend_by",
type="int",
help="extend by # bases [default=%default]")
parser.add_option("--extend-with",
dest="extend_with",
type="string",
help="extend using base [default=%default]")
parser.add_option("--masker",
dest="masker",
type="choice",
choices=("dust", "dustmasker", "softmask", "none"),
help="apply masker [%default].")
parser.add_option("--fold-at",
dest="fold_at",
type="int",
help="fold sequence every n bases[%default].")
parser.add_option(
"--fasta-name-attribute",
dest="naming_attribute",
type="string",
help="use attribute to name fasta entry. Currently only compatable"
" with gff format [%default].")
parser.set_defaults(is_gtf=False,
genome_file=None,
merge=False,
feature=None,
filename_masks=None,
remove_masked_regions=False,
min_length=0,
max_length=0,
extend_at=None,
extend_by=100,
extend_with=None,
masker=None,
fold_at=None,
naming_attribute=False)
(options, args) = E.Start(parser)
if options.genome_file:
fasta = IndexedFasta.IndexedFasta(options.genome_file)
contigs = fasta.getContigSizes()
if options.is_gtf:
iterator = GTF.transcript_iterator(GTF.iterator(options.stdin))
else:
gffs = GTF.iterator(options.stdin)
if options.merge:
iterator = GTF.joined_iterator(gffs)
else:
iterator = GTF.chunk_iterator(gffs)
masks = None
if options.filename_masks:
masks = {}
with IOTools.openFile(options.filename_masks, "r") as infile:
e = GTF.readAsIntervals(GTF.iterator(infile))
# convert intervals to intersectors
for contig in list(e.keys()):
intersector = bx.intervals.intersection.Intersecter()
for start, end in e[contig]:
intersector.add_interval(bx.intervals.Interval(start, end))
masks[contig] = intersector
ninput, noutput, nmasked, nskipped_masked = 0, 0, 0, 0
nskipped_length = 0
nskipped_noexons = 0
feature = options.feature
# iterator is a list containing groups (lists) of features.
# Each group of features have in common the same transcript ID, in case of
# GTF files.
for ichunk in iterator:
ninput += 1
if feature:
chunk = [x for x in ichunk if x.feature == feature]
else:
chunk = ichunk
if len(chunk) == 0:
nskipped_noexons += 1
E.info("no features in entry from "
"%s:%i..%i - %s" % (ichunk[0].contig, ichunk[0].start,
ichunk[0].end, str(ichunk[0])))
continue
contig, strand = chunk[0].contig, chunk[0].strand
if options.is_gtf:
name = chunk[0].transcript_id
else:
if options.naming_attribute:
attr_dict = {
x.split("=")[0]: x.split("=")[1]
for x in chunk[0].attributes.split(";")
}
name = attr_dict[options.naming_attribute]
else:
name = str(chunk[0].attributes)
lcontig = contigs[contig]
positive = Genomics.IsPositiveStrand(strand)
intervals = [(x.start, x.end) for x in chunk]
intervals.sort()
if masks:
if contig in masks:
masked_regions = []
for start, end in intervals:
masked_regions += [(x.start, x.end)
for x in masks[contig].find(start, end)]
masked_regions = Intervals.combine(masked_regions)
if len(masked_regions):
nmasked += 1
if options.remove_masked_regions:
intervals = Intervals.truncate(intervals, masked_regions)
else:
raise NotImplementedError("unimplemented")
if len(intervals) == 0:
nskipped_masked += 1
if options.loglevel >= 1:
options.stdlog.write(
"# skipped because fully masked: "
"%s: regions=%s masks=%s\n" %
(name, str([(x.start, x.end)
for x in chunk]), masked_regions))
continue
out = intervals
if options.extend_at and not options.extend_with:
if options.extend_at == "5only":
intervals = [(max(0, intervals[0][0] - options.extend_by),
intervals[0][0])]
elif options.extend_at == "3only":
intervals = [(intervals[-1][1],
min(lcontig,
intervals[-1][1] + options.extend_by))]
else:
if options.extend_at in ("5", "both"):
intervals[0] = (max(0,
intervals[0][0] - options.extend_by),
intervals[0][1])
if options.extend_at in ("3", "both"):
intervals[-1] = (intervals[-1][0],
min(lcontig,
intervals[-1][1] + options.extend_by))
if not positive:
intervals = [(lcontig - x[1], lcontig - x[0])
for x in intervals[::-1]]
out.reverse()
s = [
fasta.getSequence(contig, strand, start, end)
for start, end in intervals
]
# IMS: allow for masking of sequences
s = Masker.maskSequences(s, options.masker)
l = sum([len(x) for x in s])
if (l < options.min_length
or (options.max_length and l > options.max_length)):
nskipped_length += 1
if options.loglevel >= 1:
options.stdlog.write("# skipped because length out of bounds "
"%s: regions=%s len=%i\n" %
(name, str(intervals), l))
continue
if options.extend_at and options.extend_with:
extension = "".join((options.extend_with, ) * options.extend_by)
if options.extend_at in ("5", "both"):
s[1] = extension + s[1]
if options.extend_at in ("3", "both"):
s[-1] = s[-1] + extension
if options.fold_at:
n = options.fold_at
s = "".join(s)
seq = "\n".join([s[i:i + n] for i in range(0, len(s), n)])
else:
seq = "\n".join(s)
options.stdout.write(
">%s %s:%s:%s\n%s\n" %
(name, contig, strand, ";".join(["%i-%i" % x for x in out]), seq))
noutput += 1
E.info("ninput=%i, noutput=%i, nmasked=%i, nskipped_noexons=%i, "
"nskipped_masked=%i, nskipped_length=%i" %
(ninput, noutput, nmasked, nskipped_noexons, nskipped_masked,
nskipped_length))
E.Stop()
def main(argv=None):
if argv is None:
argv = sys.argv
parser = E.OptionParser(version="%prog version",
usage=globals()["__doc__"])
parser.add_option(
"-m",
"--method",
dest="methods",
type="choice",
action="append",
choices=("translate", "translate-to-stop", "truncate-at-stop",
"back-translate", "mark-codons", "apply-map", "build-map",
"pseudo-codons", "filter", "interleaved-codons", "map-codons",
"remove-gaps", "mask-seg", "mask-bias", "mask-codons",
"mask-incomplete-codons", "mask-stops", "mask-soft",
"remove-stops", "upper", "lower", "reverse-complement",
"sample", "shuffle"),
help="method to apply to sequences.")
parser.add_option("-p",
"--parameters",
dest="parameters",
type="string",
help="parameter stack for methods that require one "
"[default=%default].")
parser.add_option("-x",
"--ignore-errors",
dest="ignore_errors",
action="store_true",
help="ignore errors [default = %default].")
parser.add_option("--sample-proportion",
dest="sample_proportion",
type="float",
help="sample proportion [default = %default].")
parser.add_option("--exclude-pattern",
dest="exclude_pattern",
type="string",
help="exclude all sequences with ids matching pattern "
"[default = %default].")
parser.add_option("--include-pattern",
dest="include_pattern",
type="string",
help="include only sequences with ids matching pattern "
"[default = %default].")
parser.add_option("--filter-method",
dest="filter_methods",
type="string",
action="append",
help="filtering methods to apply "
"[default = %default].")
parser.add_option(
"-t",
"--sequence-type",
dest="type",
type="choice",
choices=("aa", "na"),
help="sequence type (aa or na) [%default]. This option determines "
"which characters to use for masking [default = %default].")
parser.add_option(
"-l",
"--template-identifier",
dest="template_identifier",
type="string",
help="template for numerical identifier [default = %default] "
"for the operation --build-map. A %i is replaced by the position "
"of the sequence in the file.")
parser.set_defaults(
methods=[],
parameters="",
type="na",
aa_mask_chars="xX",
aa_mask_char="x",
na_mask_chars="nN",
na_mask_char="n",
gap_chars="-.",
gap_char="-",
template_identifier="ID%06i",
ignore_errors=False,
exclude_pattern=None,
include_pattern=None,
sample_proportion=None,
filter_methods=[],
)
(options, args) = E.Start(parser)
options.parameters = options.parameters.split(",")
rx_include, rx_exclude = None, None
if options.include_pattern:
rx_include = re.compile(options.include_pattern)
if options.exclude_pattern:
rx_exclude = re.compile(options.exclude_pattern)
iterator = FastaIterator.FastaIterator(options.stdin)
nseq = 0
map_seq2nid = {}
if "apply-map" in options.methods:
map_seq2nid = IOTools.ReadMap(open(options.parameters[0], "r"))
del options.parameters[0]
if options.type == "na":
mask_chars = options.na_mask_chars
mask_char = options.na_mask_char
else:
mask_chars = options.aa_mask_chars
mask_char = options.aa_mask_char
if "map-codons" in options.methods:
map_codon2code = IOTools.ReadMap(open(options.parameters[0], "r"))
del options.parameters[0]
if "mask-soft" in options.methods:
f = options.parameters[0]
del options.parameters[0]
hard_masked_iterator = FastaIterator.FastaIterator(open(f, "r"))
if "mask-codons" in options.methods or "back-translate" in options.methods:
# open a second stream to read sequences from
f = options.parameters[0]
del options.parameters[0]
other_iterator = FastaIterator.FastaIterator(open(f, "r"))
ninput, noutput, nerrors, nskipped = 0, 0, 0, 0
if "sample" in options.methods:
if not options.sample_proportion:
raise ValueError("specify a sample proportion")
sample_proportion = options.sample_proportion
else:
sample_proportion = None
filter_min_sequence_length = None
filter_max_sequence_length = None
filter_id_list = None
for f in options.filter_methods:
if f.startswith("min-length"):
filter_min_sequence_length = int(f.split("=")[1])
elif f.startswith("max-length"):
filter_max_sequence_length = int(f.split("=")[1])
elif f.startswith("id-file"):
filter_id_list = [
line[:-1] for line in IOTools.openFile(f.split("=")[1])
]
def raiseIfNotCodon(l, title):
'''raise ValueError if sequence length l is not divisible by
3'''
if l % 3 != 0:
raise ValueError("length of sequence %s not divisible by 3" %
(title))
while 1:
try:
cur_record = next(iterator)
except StopIteration:
break
if cur_record is None:
break
nseq += 1
ninput += 1
sequence = re.sub(" ", "", cur_record.sequence)
l = len(sequence)
if rx_include and not rx_include.search(cur_record.title):
nskipped += 1
continue
if rx_exclude and rx_exclude.search(cur_record.title):
nskipped += 1
continue
if sample_proportion:
if random.random() > sample_proportion:
continue
if not (filter_id_list is None or cur_record.title in filter_id_list):
nskipped += 1
continue
for method in options.methods:
if method == "translate":
# translate such that gaps are preserved
seq = []
ls = len(re.sub('[%s]' % options.gap_chars, sequence, ""))
if ls % 3 != 0:
msg = "length of sequence %s (%i) not divisible by 3" % (
cur_record.title, ls)
nerrors += 1
if options.ignore_errors:
E.warn(msg)
continue
else:
raise ValueError(msg)
for codon in [sequence[x:x + 3] for x in range(0, l, 3)]:
aa = Genomics.MapCodon2AA(codon)
seq.append(aa)
sequence = "".join(seq)
elif method == "back-translate":
# translate from an amino acid alignment to codon alignment
seq = []
try:
other_record = next(other_iterator)
except StopIteration:
raise ValueError("run out of sequences")
if cur_record.title != other_record.title:
raise "sequence titles don't match: %s %s" % (
cur_record.title, other_record.title)
other_sequence = re.sub("[ %s]" % options.gap_chars, "",
other_record.sequence)
if len(other_sequence) % 3 != 0:
raise ValueError(
"length of sequence %s not divisible by 3" %
(other_record.title))
r = re.sub("[%s]" % options.gap_chars, "", sequence)
if len(other_sequence) != len(r) * 3:
raise ValueError(
"length of sequences do not match: %i vs %i" %
(len(other_sequence), len(r)))
x = 0
for aa in sequence:
if aa in options.gap_chars:
c = options.gap_char * 3
else:
c = other_sequence[x:x + 3]
x += 3
seq.append(c)
sequence = "".join(seq)
elif method == "pseudo-codons":
raiseIfNotCodon(l, cur_record.title)
seq = []
for codon in [sequence[x:x + 3] for x in range(0, l, 3)]:
aa = Genomics.MapCodon2AA(codon)
seq.append(aa)
sequence = " ".join(seq)
elif method == "reverse-complement":
sequence = string.translate(
sequence, string.maketrans("ACGTacgt", "TGCAtgca"))[::-1]
elif method in ("mask-stops", "remove-stops"):
c = []
codon = []
new_sequence = []
if method == "mask-stops":
char = options.na_mask_char
elif method == "remove-stops":
char = options.gap_char
for x in sequence:
if x not in options.gap_chars:
codon.append(x.upper())
c.append(x)
if len(codon) == 3:
codon = "".join(codon).upper()
# mask all non-gaps
if Genomics.IsStopCodon(codon):
for x in c:
if x in options.gap_chars:
new_sequence.append(x)
else:
new_sequence.append(char)
else:
new_sequence += c
c = []
codon = []
new_sequence += c
sequence = "".join(new_sequence)
elif method == "mask-soft":
# Get next hard masked record and extract sequence and length
try:
cur_hm_record = next(hard_masked_iterator)
except StopIteration:
break
hm_sequence = re.sub(" ", "", cur_hm_record.sequence)
lhm = len(hm_sequence)
new_sequence = []
# Check lengths of unmasked and soft masked sequences the same
if l != lhm:
raise ValueError(
"length of unmasked and hard masked sequences not "
"identical for record %s" % (cur_record.title))
# Check if hard masked seq contains repeat (N), if so replace N
# with lowercase sequence from unmasked version
if sequence == hm_sequence:
pass
else:
for x, y in zip_longest(sequence, hm_sequence):
if y == "N":
new_sequence += x.lower()
else:
new_sequence += x.upper()
sequence = "".join(new_sequence)
elif method == "map-codons":
raiseIfNotCodon(l, cur_record.title)
seq = []
for codon in (sequence[x:x + 3].upper()
for x in range(0, l, 3)):
if codon not in map_codon2code:
aa = "X"
else:
aa = map_codon2code[codon]
seq.append(aa)
sequence = "".join(seq)
elif method == "interleaved-codons":
raiseIfNotCodon(l, cur_record.title)
seq = []
for codon in [sequence[x:x + 3] for x in range(0, l, 3)]:
aa = Genomics.MapCodon2AA(codon)
seq.append("%s:%s" % (aa, codon))
sequence = " ".join(seq)
elif method == "translate-to-stop":
seq = []
for codon in [sequence[x:x + 3] for x in range(0, l, 3)]:
if Genomics.IsStopCodon(codon):
break
aa = Genomics.MapCodon2AA(codon)
seq.append(aa)
sequence = "".join(seq)
elif method == "truncate-at-stop":
seq = []
for codon in [sequence[x:x + 3] for x in range(0, l, 3)]:
if Genomics.IsStopCodon(codon):
break
seq.append(codon)
sequence = "".join(seq)
elif method == "remove-gaps":
seq = []
for s in sequence:
if s in options.gap_chars:
continue
seq.append(s)
sequence = "".join(seq)
elif method == "upper":
sequence = sequence.upper()
elif method == "lower":
sequence = sequence.lower()
elif method == "mark-codons":
raiseIfNotCodon(l, cur_record.title)
seq = []
sequence = " ".join(
[sequence[x:x + 3] for x in range(0, l, 3)])
elif method == "apply-map":
id = re.match("^(\S+)", cur_record.title).groups()[0]
if id in map_seq2nid:
rest = cur_record.title[len(id):]
cur_record.title = map_seq2nid[id] + rest
elif method == "build-map":
# build a map of identifiers
id = re.match("^(\S+)", cur_record.title).groups()[0]
new_id = options.template_identifier % nseq
if id in map_seq2nid:
raise "duplicate fasta entries - can't map those: %s" % id
map_seq2nid[id] = new_id
cur_record.title = new_id
elif method == "mask-bias":
masker = Masker.MaskerBias()
sequence = masker(sequence)
elif method == "mask-seg":
masker = Masker.MaskerSeg()
sequence = masker(sequence)
elif method == "shuffle":
s = list(sequence)
random.shuffle(s)
sequence = "".join(s)
elif method == "mask-incomplete-codons":
seq = list(sequence)
for x in range(0, l, 3):
nm = len([x for x in seq[x:x + 3] if x in mask_chars])
if 0 < nm < 3:
seq[x:x + 3] = [mask_char] * 3
sequence = "".join(seq)
elif method == "mask-codons":
# mask codons based on amino acids given as reference
# sequences.
other_record = next(other_iterator)
if other_record is None:
raise ValueError("run out of sequences.")
if cur_record.title != other_record.title:
raise ValueError("sequence titles don't match: %s %s" %
(cur_record.title, other_record.title))
other_sequence = re.sub(" ", "", other_record.sequence)
if len(other_sequence) * 3 != len(sequence):
raise ValueError(
"sequences for %s don't have matching lengths %i - %i"
% (cur_record.title, len(other_sequence) * 3,
len(sequence)))
seq = list(sequence)
c = 0
for x in other_sequence:
if x in options.aa_mask_chars:
if x.isupper():
seq[c:c + 3] = [options.na_mask_char.upper()] * 3
else:
seq[c:c + 3] = [options.na_mask_char.lower()] * 3
c += 3
sequence = "".join(seq)
l = len(sequence)
if filter_min_sequence_length is not None and \
l < filter_min_sequence_length:
nskipped += 1
if filter_max_sequence_length is not None and \
l > filter_max_sequence_length:
nskipped += 1
continue
options.stdout.write(">%s\n%s\n" % (cur_record.title, sequence))
noutput += 1
if "build-map" in options.methods:
p = options.parameters[0]
if p:
outfile = IOTools.openFile(p, "w")
else:
outfile = options.stdout
outfile.write("old\tnew\n")
for old_id, new_id in list(map_seq2nid.items()):
outfile.write("%s\t%s\n" % (old_id, new_id))
if p:
outfile.close()
E.info("ninput=%i, noutput=%i, nskipped=%i, nerrors=%i" %
(ninput, noutput, nskipped, nerrors))
E.Stop()
def main(argv=None):
"""script main.
parses command line options in sys.argv, unless *argv* is given.
"""
if argv is None:
argv = sys.argv
parser = E.OptionParser(
version="%prog version: $Id$",
usage=globals()["__doc__"])
parser.add_option("--is-gtf", dest="is_gtf", action="store_true",
help="input is gtf instead of gff.")
parser.add_option("-g", "--genome-file", dest="genome_file", type="string",
help="filename with genome [default=%default].")
parser.add_option(
"-m", "--merge-adjacent", dest="merge", action="store_true",
help="merge adjacent intervals with the same attributes."
" [default=%default]")
parser.add_option(
"-e", "--feature", dest="feature", type="string",
help="filter by a feature, for example 'exon', 'CDS'."
" If set to the empty string, all entries are output "
"[%default].")
parser.add_option(
"-f", "--maskregions-bed-file", dest="filename_masks",
type="string", metavar="gff",
help="mask sequences with regions given in gff file "
"[%default].")
parser.add_option(
"--remove-masked-regions", dest="remove_masked_regions",
action="store_true",
help="remove regions instead of masking [%default].")
parser.add_option(
"--min-interval-length", dest="min_length", type="int",
help="set minimum length for sequences output "
"[%default]")
parser.add_option(
"--max-length", dest="max_length", type="int",
help="set maximum length for sequences output "
"[%default]")
parser.add_option(
"--extend-at", dest="extend_at", type="choice",
choices=("none", "3", "5", "both", "3only", "5only"),
help="extend at no end, 3', 5' or both ends. If "
"3only or 5only are set, only the added sequence "
"is returned [default=%default]")
parser.add_option(
"--extend-by", dest="extend_by", type="int",
help="extend by # bases [default=%default]")
parser.add_option(
"--extend-with", dest="extend_with", type="string",
help="extend using base [default=%default]")
parser.add_option(
"--masker", dest="masker", type="choice",
choices=("dust", "dustmasker", "softmask", "none"),
help="apply masker [%default].")
parser.add_option(
"--fold-at", dest="fold_at", type="int",
help="fold sequence every n bases[%default].")
parser.add_option(
"--fasta-name-attribute", dest="naming_attribute", type="string",
help="use attribute to name fasta entry. Currently only compatable"
" with gff format [%default].")
parser.set_defaults(
is_gtf=False,
genome_file=None,
merge=False,
feature=None,
filename_masks=None,
remove_masked_regions=False,
min_length=0,
max_length=0,
extend_at=None,
extend_by=100,
extend_with=None,
masker=None,
fold_at=None,
naming_attribute=False
)
(options, args) = E.Start(parser)
if options.genome_file:
fasta = IndexedFasta.IndexedFasta(options.genome_file)
contigs = fasta.getContigSizes()
if options.is_gtf:
iterator = GTF.transcript_iterator(GTF.iterator(options.stdin))
else:
gffs = GTF.iterator(options.stdin)
if options.merge:
iterator = GTF.joined_iterator(gffs)
else:
iterator = GTF.chunk_iterator(gffs)
masks = None
if options.filename_masks:
masks = {}
with open(options.filename_masks, "r") as infile:
e = GTF.readAsIntervals(GTF.iterator(infile))
# convert intervals to intersectors
for contig in e.keys():
intersector = bx.intervals.intersection.Intersecter()
for start, end in e[contig]:
intersector.add_interval(bx.intervals.Interval(start, end))
masks[contig] = intersector
ninput, noutput, nmasked, nskipped_masked = 0, 0, 0, 0
nskipped_length = 0
nskipped_noexons = 0
feature = options.feature
# for item in iterator:
# print len(item) # 3, 2
# for i in item:
# print len(i) # 9, 9, 9, 9, 9
# print i.contig
# print i.strand
# print i.transcript_id
# iterator is a list containing groups (lists) of features.
# Each group of features have in common the same transcript ID, in case of
# GTF files.
for ichunk in iterator:
ninput += 1
if feature:
chunk = filter(lambda x: x.feature == feature, ichunk)
else:
chunk = ichunk
if len(chunk) == 0:
nskipped_noexons += 1
E.info("no features in entry from "
"%s:%i..%i - %s" % (ichunk[0].contig,
ichunk[0].start,
ichunk[0].end,
str(ichunk[0])))
continue
contig, strand = chunk[0].contig, chunk[0].strand
if options.is_gtf:
name = chunk[0].transcript_id
else:
if options.naming_attribute:
attr_dict = {x.split("=")[0]: x.split("=")[1]
for x in chunk[0].attributes.split(";")}
name = attr_dict[options.naming_attribute]
else:
name = str(chunk[0].attributes)
lcontig = contigs[contig]
positive = Genomics.IsPositiveStrand(strand)
intervals = [(x.start, x.end) for x in chunk]
intervals.sort()
if masks:
if contig in masks:
masked_regions = []
for start, end in intervals:
masked_regions += [(x.start, x.end)
for x in masks[contig].find(start, end)]
masked_regions = Intervals.combine(masked_regions)
if len(masked_regions):
nmasked += 1
if options.remove_masked_regions:
intervals = Intervals.truncate(intervals, masked_regions)
else:
raise "unimplemented"
if len(intervals) == 0:
nskipped_masked += 1
if options.loglevel >= 1:
options.stdlog.write("# skipped because fully masked: "
"%s: regions=%s masks=%s\n" %
(name,
str([(x.start,
x.end) for x in chunk]),
masked_regions))
continue
out = intervals
if options.extend_at and not options.extend_with:
if options.extend_at == "5only":
intervals = [(max(0, intervals[0][0] - options.extend_by),
intervals[0][0])]
elif options.extend_at == "3only":
intervals = [(intervals[-1][1],
min(lcontig,
intervals[-1][1] + options.extend_by))]
else:
if options.extend_at in ("5", "both"):
intervals[0] = (max(0,
intervals[0][0] - options.extend_by),
intervals[0][1])
if options.extend_at in ("3", "both"):
intervals[-1] = (intervals[-1][0],
min(lcontig,
intervals[-1][1] + options.extend_by))
if not positive:
intervals = [(lcontig - x[1], lcontig - x[0])
for x in intervals[::-1]]
out.reverse()
s = [fasta.getSequence(contig, strand, start, end)
for start, end in intervals]
# IMS: allow for masking of sequences
s = Masker.maskSequences(s, options.masker)
l = sum([len(x) for x in s])
if (l < options.min_length or
(options.max_length and l > options.max_length)):
nskipped_length += 1
if options.loglevel >= 1:
options.stdlog.write("# skipped because length out of bounds "
"%s: regions=%s len=%i\n" %
(name, str(intervals), l))
continue
if options.extend_at and options.extend_with:
extension = "".join((options.extend_with,) * options.extend_by)
if options.extend_at in ("5", "both"):
s[1] = extension + s[1]
if options.extend_at in ("3", "both"):
s[-1] = s[-1] + extension
if options.fold_at:
n = options.fold_at
s = "".join(s)
seq = "\n".join([s[i:i+n] for i in range(0, len(s), n)])
else:
seq = "\n".join(s)
options.stdout.write(">%s %s:%s:%s\n%s\n" % (name,
contig,
strand,
";".join(
["%i-%i" %
x for x in out]),
seq))
noutput += 1
E.info("ninput=%i, noutput=%i, nmasked=%i, nskipped_noexons=%i, "
"nskipped_masked=%i, nskipped_length=%i" %
(ninput, noutput, nmasked, nskipped_noexons,
nskipped_masked, nskipped_length))
E.Stop()
class DustMaskerCheck(unittest.TestCase):
mMasker = Masker.MaskerDustMasker()
def main(argv=None):
if argv is None:
argv = sys.argv
parser = E.OptionParser(
version="%prog version: $Id: gff2fasta.py 2861 2010-02-23 17:36:32Z andreas $")
parser.add_option("-g", "--genome-file", dest="genome_file", type="string",
help="filename with genome.")
parser.add_option("-m", "--masker", dest="masker", type="choice",
choices=("dust", "dustmasker", "softmask", "none"),
help="apply masker [%default].")
parser.add_option("-o", "--mode", dest="mode", type="choice",
choices=("intervals", "leftright"),
help="what to output [%default]")
parser.add_option("--min-length", dest="min_length", type="int",
help="require a minimum sequence length [%default]")
parser.add_option("--max-length", dest="max_length", type="int",
help="require a maximum sequence length [%default]")
parser.add_option("--extend-at", dest="extend_at", type="choice",
choices=("none", "3", "5", "both", "3only", "5only"),
help="extend at no, 3', 5' or both ends. If 3only or 5only are set, only the added sequence is returned [default=%default]")
parser.add_option("--extend-by", dest="extend_by", type="int",
help="extend by # bases [default=%default]")
parser.add_option("--use-strand", dest="ignore_strand", action="store_false",
help="use strand information and return reverse complement [default=%default]")
parser.set_defaults(
genome_file=None,
masker=None,
mode="intervals",
min_length=0,
max_length=0,
extend_at=None,
extend_by=100,
ignore_strand=True,
)
(options, args) = E.Start(parser)
if options.genome_file:
fasta = IndexedFasta.IndexedFasta(options.genome_file)
contigs = fasta.getContigSizes()
fasta.setConverter(IndexedFasta.getConverter("zero-both-open"))
counter = E.Counter()
ids, seqs = [], []
E.info("collecting sequences")
for bed in Bed.setName(Bed.iterator(options.stdin)):
counter.input += 1
lcontig = fasta.getLength(bed.contig)
if options.ignore_strand:
strand = "+"
else:
strand = bed.strand
if options.mode == "intervals":
ids.append("%s %s:%i..%i (%s)" %
(bed.name, bed.contig, bed.start, bed.end, strand))
seqs.append(
fasta.getSequence(bed.contig, strand, bed.start, bed.end))
elif options.mode == "leftright":
l = bed.end - bed.start
start, end = max(0, bed.start - l), bed.end - l
ids.append("%s_l %s:%i..%i (%s)" %
(bed.name, bed.contig, start, end, strand))
seqs.append(fasta.getSequence(bed.contig, strand, start, end))
start, end = bed.start + l, min(lcontig, bed.end + l)
ids.append("%s_r %s:%i..%i (%s)" %
(bed.name, bed.contig, start, end, strand))
seqs.append(fasta.getSequence(bed.contig, strand, start, end))
E.info("collected %i sequences" % len(seqs))
masked = Masker.maskSequences(seqs, options.masker)
options.stdout.write(
"\n".join([">%s\n%s" % (x, y) for x, y in zip(ids, masked)]) + "\n")
E.info("masked %i sequences" % len(seqs))
counter.output = len(seqs)
E.info("%s" % counter)
E.Stop()
def main(argv=None):
if argv is None:
argv = sys.argv
parser = E.OptionParser(version="%prog version: $Id$",
usage=globals()["__doc__"])
parser.add_option("-g",
"--genome-file",
dest="genome_file",
type="string",
help="filename with genomic sequence to retrieve "
"sequences from.")
parser.add_option("-m",
"--masker",
dest="masker",
type="choice",
choices=("dust", "dustmasker", "softmask", "none"),
help="apply masker to mask output sequences "
"[%default].")
parser.add_option("--output-mode",
dest="output_mode",
type="choice",
choices=("intervals", "leftright", "segments"),
help="what to output. "
"'intervals' generates a single sequence for "
"each bed interval. 'leftright' generates two "
"sequences, one in each direction, for each bed "
"interval. 'segments' can be used to output "
"sequence from bed12 files so that sequence only covers "
"the segements [%default]")
parser.add_option("--min-sequence-length",
dest="min_length",
type="int",
help="require a minimum sequence length [%default]")
parser.add_option("--max-sequence-length",
dest="max_length",
type="int",
help="require a maximum sequence length [%default]")
parser.add_option(
"--extend-at",
dest="extend_at",
type="choice",
choices=("none", "3", "5", "both", "3only", "5only"),
help="extend at 3', 5' or both or no ends. If 3only or 5only "
"are set, only the added sequence is returned [default=%default]")
parser.add_option("--extend-by",
dest="extend_by",
type="int",
help="extend by # bases [default=%default]")
parser.add_option(
"--use-strand",
dest="ignore_strand",
action="store_false",
help="use strand information and return reverse complement "
"on intervals located on the negative strand. "
"[default=%default]")
parser.set_defaults(
genome_file=None,
masker=None,
output_mode="intervals",
min_length=0,
max_length=0,
extend_at=None,
extend_by=100,
ignore_strand=True,
)
(options, args) = E.start(parser)
if options.genome_file:
fasta = IndexedFasta.IndexedFasta(options.genome_file)
contigs = fasta.getContigSizes()
fasta.setConverter(IndexedFasta.getConverter("zero-both-open"))
counter = E.Counter()
ids, seqs = [], []
E.info("collecting sequences")
for bed in Bed.setName(Bed.iterator(options.stdin)):
counter.input += 1
lcontig = fasta.getLength(bed.contig)
if options.ignore_strand:
strand = "+"
else:
strand = bed.strand
if options.output_mode == "segments" and bed.columns == 12:
ids.append("%s %s:%i..%i (%s) %s %s" %
(bed.name, bed.contig, bed.start, bed.end, strand,
bed["blockSizes"], bed["blockStarts"]))
seg_seqs = [
fasta.getSequence(bed.contig, strand, start, end)
for start, end in bed.toIntervals()
]
seqs.append("".join(seg_seqs))
elif (options.output_mode == "intervals"
or options.output_mode == "segments"):
ids.append("%s %s:%i..%i (%s)" %
(bed.name, bed.contig, bed.start, bed.end, strand))
seqs.append(
fasta.getSequence(bed.contig, strand, bed.start, bed.end))
elif options.output_mode == "leftright":
l = bed.end - bed.start
start, end = max(0, bed.start - l), bed.end - l
ids.append("%s_l %s:%i..%i (%s)" %
(bed.name, bed.contig, start, end, strand))
seqs.append(fasta.getSequence(bed.contig, strand, start, end))
start, end = bed.start + l, min(lcontig, bed.end + l)
ids.append("%s_r %s:%i..%i (%s)" %
(bed.name, bed.contig, start, end, strand))
seqs.append(fasta.getSequence(bed.contig, strand, start, end))
E.info("collected %i sequences" % len(seqs))
masked = Masker.maskSequences(seqs, options.masker)
options.stdout.write(
"\n".join([">%s\n%s" % (x, y) for x, y in zip(ids, masked)]) + "\n")
E.info("masked %i sequences" % len(seqs))
counter.output = len(seqs)
E.info("%s" % counter)
E.stop()
def main(argv=None):
if argv == None: argv = sys.argv
parser = E.OptionParser(
version=
"%prog version: $Id: gff2fasta.py 2861 2010-02-23 17:36:32Z andreas $")
parser.add_option("-g",
"--genome-file",
dest="genome_file",
type="string",
help="filename with genome.")
parser.add_option("-m",
"--masker",
dest="masker",
type="choice",
choices=("dust", "dustmasker", "softmask", "none"),
help="apply masker [%default].")
parser.add_option("-o",
"--mode",
dest="mode",
type="choice",
choices=("intervals", "leftright"),
help="what to output [%default]")
parser.add_option("--min-length",
dest="min_length",
type="int",
help="require a minimum sequence length [%default]")
parser.add_option("--max-length",
dest="max_length",
type="int",
help="require a maximum sequence length [%default]")
parser.add_option(
"--extend-at",
dest="extend_at",
type="choice",
choices=("none", "3", "5", "both", "3only", "5only"),
help=
"extend at no, 3', 5' or both ends. If 3only or 5only are set, only the added sequence is returned [default=%default]"
)
parser.add_option("--extend-by",
dest="extend_by",
type="int",
help="extend by # bases [default=%default]")
parser.add_option(
"--use-strand",
dest="ignore_strand",
action="store_false",
help=
"use strand information and return reverse complement [default=%default]"
)
parser.set_defaults(
genome_file=None,
masker=None,
mode="intervals",
min_length=0,
max_length=0,
extend_at=None,
extend_by=100,
ignore_strand=True,
)
(options, args) = E.Start(parser)
if options.genome_file:
fasta = IndexedFasta.IndexedFasta(options.genome_file)
contigs = fasta.getContigSizes()
fasta.setConverter(IndexedFasta.getConverter("zero-both-open"))
counter = E.Counter()
ids, seqs = [], []
E.info("collecting sequences")
for bed in Bed.setName(Bed.iterator(options.stdin)):
counter.input += 1
lcontig = fasta.getLength(bed.contig)
if options.ignore_strand:
strand = "+"
else:
strand = bed.strand
if options.mode == "intervals":
ids.append("%s %s:%i..%i (%s)" %
(bed.name, bed.contig, bed.start, bed.end, strand))
seqs.append(
fasta.getSequence(bed.contig, strand, bed.start, bed.end))
elif options.mode == "leftright":
l = bed.end - bed.start
start, end = max(0, bed.start - l), bed.end - l
ids.append("%s_l %s:%i..%i (%s)" %
(bed.name, bed.contig, start, end, strand))
seqs.append(fasta.getSequence(bed.contig, strand, start, end))
start, end = bed.start + l, min(lcontig, bed.end + l)
ids.append("%s_r %s:%i..%i (%s)" %
(bed.name, bed.contig, start, end, strand))
seqs.append(fasta.getSequence(bed.contig, strand, start, end))
E.info("collected %i sequences" % len(seqs))
masked = Masker.maskSequences(seqs, options.masker)
options.stdout.write(
"\n".join([">%s\n%s" % (x, y) for x, y in zip(ids, masked)]) + "\n")
E.info("masked %i sequences" % len(seqs))
counter.output = len(seqs)
E.info("%s" % counter)
E.Stop()
def main(argv=None):
"""script main.
parses command line options in sys.argv, unless *argv* is given.
"""
if argv == None: argv = sys.argv
parser = E.OptionParser(
version=
"%prog version: $Id: gff2fasta.py 2861 2010-02-23 17:36:32Z andreas $",
usage=globals()["__doc__"])
parser.add_option("--is-gtf",
dest="is_gtf",
action="store_true",
help="input is gtf instead of gff.")
parser.add_option("-g",
"--genome-file",
dest="genome_file",
type="string",
help="filename with genome [default=%default].")
parser.add_option(
"-m",
"--merge",
dest="merge",
action="store_true",
help="merge adjacent intervals with the same attributes. "
"[default=%default]")
parser.add_option(
"-e",
"--feature",
dest="feature",
type="string",
help="filter by a feature, for example 'exon', 'CDS'. If "
"set to the empty string, all entries are output [%default].")
parser.add_option(
"-f",
"--filename-masks",
dest="filename_masks",
type="string",
metavar="gff",
help="mask sequences with regions given in gff file [%default].")
parser.add_option("--remove-masked-regions",
dest="remove_masked_regions",
action="store_true",
help="remove regions instead of masking [%default].")
parser.add_option(
"--min-length",
dest="min_length",
type="int",
help="set minimum length for sequences output [%default]")
parser.add_option(
"--max-length",
dest="max_length",
type="int",
help="set maximum length for sequences output [%default]")
parser.add_option("--extend-at",
dest="extend_at",
type="choice",
choices=("none", "3", "5", "both", "3only", "5only"),
help="extend at no end, 3', 5' or both ends. If "
"3only or 5only are set, only the added sequence "
"is returned [default=%default]")
parser.add_option("--extend-by",
dest="extend_by",
type="int",
help="extend by # bases [default=%default]")
parser.add_option("--masker",
dest="masker",
type="choice",
choices=("dust", "dustmasker", "softmask", "none"),
help="apply masker [%default].")
parser.set_defaults(is_gtf=False,
genome_file=None,
merge=False,
feature=None,
filename_masks=None,
remove_masked_regions=False,
min_length=0,
max_length=0,
extend_at=None,
extend_by=100,
masker=None)
(options, args) = E.Start(parser)
if options.genome_file:
fasta = IndexedFasta.IndexedFasta(options.genome_file)
contigs = fasta.getContigSizes()
if options.is_gtf:
iterator = GTF.transcript_iterator(GTF.iterator(sys.stdin))
else:
gffs = GTF.iterator(sys.stdin)
if options.merge:
iterator = GTF.joined_iterator(gffs)
else:
iterator = GTF.chunk_iterator(gffs)
masks = None
if options.filename_masks:
masks = {}
with open(options.filename_masks, "r") as infile:
e = GTF.readAsIntervals(GFF.iterator(infile))
# convert intervals to intersectors
for contig in e.keys():
intersector = bx.intervals.intersection.Intersecter()
for start, end in e[contig]:
intersector.add_interval(bx.intervals.Interval(start, end))
masks[contig] = intersector
ninput, noutput, nmasked, nskipped_masked = 0, 0, 0, 0
nskipped_length = 0
nskipped_noexons = 0
feature = options.feature
# for item in iterator:
# print len(item) # 3, 2
# for i in item:
# print len(i) # 9, 9, 9, 9, 9
# print i.contig
# print i.strand
# print i.transcript_id
# iterator is a list containing groups (lists) of features.
# Each group of features have in common the same transcript ID, in case of GTF files.
for ichunk in iterator:
ninput += 1
if feature:
chunk = filter(lambda x: x.feature == feature, ichunk)
else:
chunk = ichunk
if len(chunk) == 0:
nskipped_noexons += 1
E.info("no features in entry from %s:%i..%i - %s" %
(ichunk[0].contig, ichunk[0].start, ichunk[0].end,
str(ichunk[0])))
continue
contig, strand = chunk[0].contig, chunk[0].strand
if options.is_gtf:
name = chunk[0].transcript_id
else:
name = str(chunk[0].attributes)
lcontig = contigs[contig]
positive = Genomics.IsPositiveStrand(strand)
intervals = [(x.start, x.end) for x in chunk]
intervals.sort()
if masks:
if contig in masks:
masked_regions = []
for start, end in intervals:
masked_regions += [(x.start, x.end)
for x in masks[contig].find(start, end)]
masked_regions = Intervals.combine(masked_regions)
if len(masked_regions): nmasked += 1
if options.remove_masked_regions:
intervals = Intervals.truncate(intervals, masked_regions)
else:
raise "unimplemented"
if len(intervals) == 0:
nskipped_masked += 1
if options.loglevel >= 1:
options.stdlog.write( "# skipped because fully masked: %s: regions=%s masks=%s\n" %\
(name, str([ (x.start, x.end) for x in chunk ]), masked_regions) )
continue
out = intervals
if options.extend_at:
if options.extend_at == "5only":
intervals = [(max(0, intervals[0][0] - options.extend_by),
intervals[0][0])]
elif options.extend_at == "3only":
intervals = [(intervals[-1][1],
min(lcontig,
intervals[-1][1] + options.extend_by))]
else:
if options.extend_at in ("5", "both"):
intervals[0] = (max(0,
intervals[0][0] - options.extend_by),
intervals[0][1])
if options.extend_at in ("3", "both"):
intervals[-1] = (intervals[-1][0],
min(lcontig,
intervals[-1][1] + options.extend_by))
if not positive:
intervals = [(lcontig - x[1], lcontig - x[0])
for x in intervals[::-1]]
out.reverse()
s = [
fasta.getSequence(contig, strand, start, end)
for start, end in intervals
]
#IMS: allow for masking of sequences
s = Masker.maskSequences(s, options.masker)
l = sum([len(x) for x in s])
if l < options.min_length or (options.max_length
and l > options.max_length):
nskipped_length += 1
if options.loglevel >= 1:
options.stdlog.write( "# skipped because length out of bounds %s: regions=%s len=%i\n" %\
(name, str(intervals), l) )
continue
options.stdout.write(
">%s %s:%s:%s\n%s\n" %
(name, contig, strand, ";".join(["%i-%i" % x
for x in out]), "\n".join(s)))
noutput += 1
E.info( "ninput=%i, noutput=%i, nmasked=%i, nskipped_noexons=%i, nskipped_masked=%i, nskipped_length=%i" %\
(ninput, noutput, nmasked, nskipped_noexons, nskipped_masked, nskipped_length ) )
E.Stop()