def db(tmpdir, transcripts):
from pita.annotationdb import AnnotationDb
conn = "sqlite:///{}/pita_test.db".format(tmpdir)
with AnnotationDb(conn=conn, new=True) as d:
for name, source, exons in transcripts:
d.add_transcript(name, source, exons)
yield d
def load_chrom_data(conn, new, chrom, anno_files, data, index=None):
logger = logging.getLogger("pita")
try:
# Read annotation files
db = AnnotationDb(index=index, conn=conn, new=new)
logger.debug("%s %s", chrom, id(db.session))
logger.info("Reading annotation for %s", chrom)
for name, fname, tabix_file, ftype, min_exons in anno_files:
logger.info("Reading annotation from %s", fname)
tabixfile = pysam.Tabixfile(tabix_file)
#tabixfile = fname
if chrom in tabixfile.contigs:
fobj = TabixIteratorAsFile(tabixfile.fetch(chrom))
if ftype == "bed":
it = read_bed_transcripts(fobj,
fname,
min_exons=min_exons,
merge=10)
elif ftype in ["gff", "gtf", "gff3"]:
it = read_gff_transcripts(fobj,
fname,
min_exons=min_exons,
merge=10)
for tname, source, exons in it:
db.add_transcript("{0}{1}{2}".format(name, SEP, tname),
source, exons)
del fobj
tabixfile.close()
del tabixfile
logger.info("Loading data for %s", chrom)
for name, fname, span, extend in data:
if span == "splice":
logger.info("Reading splice data %s from %s", name, fname)
db.get_splice_statistics(chrom, fname, name)
else:
logger.info("Reading BAM data %s from %s", name, fname)
db.get_read_statistics(chrom,
fname,
name=name,
span=span,
extend=extend,
nreads=None)
except:
logger.exception("Error on %s", chrom)
raise
def load_chrom_data(conn, new, chrom, anno_files, data, index=None):
logger = logging.getLogger("pita")
try:
# Read annotation files
db = AnnotationDb(index=index, conn=conn, new=new)
logger.debug("%s %s", chrom, id(db.session))
logger.info("Reading annotation for %s", chrom)
for name, fname, tabix_file, ftype, min_exons in anno_files:
logger.info("Reading annotation from %s", fname)
tabixfile = pysam.Tabixfile(tabix_file)
#tabixfile = fname
if chrom in tabixfile.contigs:
fobj = TabixIteratorAsFile(tabixfile.fetch(chrom))
if ftype == "bed":
it = read_bed_transcripts(fobj, fname,
min_exons=min_exons, merge=10)
elif ftype in ["gff", "gtf", "gff3"]:
it = read_gff_transcripts(fobj, fname,
min_exons=min_exons, merge=10)
for tname, source, exons in it:
db.add_transcript(
"{0}{1}{2}".format(name, SEP, tname),
source, exons)
del fobj
tabixfile.close()
del tabixfile
logger.info("Loading data for %s", chrom)
for name, fname, span, extend in data:
if span == "splice":
logger.info("Reading splice data %s from %s", name, fname)
db.get_splice_statistics(chrom, fname, name)
else:
logger.info("Reading BAM data %s from %s", name, fname)
db.get_read_statistics(chrom, fname, name=name, span=span, extend=extend, nreads=None)
except:
logger.exception("Error on %s", chrom)
raise
def get_chrom_models(conn,
chrom,
weight,
repeats=None,
prune=None,
keep=None,
filter_ev=None,
experimental=None):
if keep is None:
keep = []
if filter_ev is None:
filter_ev = []
if experimental is None:
experimental = []
logger = logging.getLogger("pita")
logger.debug(str(weight))
try:
db = AnnotationDb(conn=conn)
# Filter repeats
if repeats:
for x in repeats:
db.filter_repeats(chrom, x)
for ev in filter_ev:
db.filter_evidence(chrom, ev, experimental)
mc = DbCollection(db, weight, prune=prune, chrom=chrom)
# Remove short introns
#mc.filter_short_introns()
models = {}
exons = {}
logger.info("Calling transcripts for %s", chrom)
for model in mc.get_best_variants(weight):
genename = "{0}:{1}-{2}_".format(
model[0].chrom,
model[0].start,
model[-1].end,
)
logger.info("Best model: %s with %s exons", genename, len(model))
models[genename] = [genename, model]
for exon in model:
exons[str(exon)] = [exon, genename]
discard = {}
if prune:
logger.debug("Prune: {0}".format(prune))
overlap = get_overlapping_models([x[0] for x in exons.values()])
if len(overlap) > 1:
logger.info("%s overlapping exons", len(overlap))
# logger.warn("Overlap: {0}".format(overlap))
gene_count = {}
for e1, e2 in overlap:
gene1 = exons[str(e1)][1]
gene2 = exons[str(e2)][1]
gene_count[gene1] = gene_count.setdefault(gene1, 0) + 1
gene_count[gene2] = gene_count.setdefault(gene2, 0) + 1
for e1, e2 in overlap:
gene1 = exons[str(e1)][1]
gene2 = exons[str(e2)][1]
if not (gene1 in discard or gene2 in discard):
m1 = models[gene1][1]
m2 = models[gene2][1]
loc1, loc2 = sorted(
[m1, m2], cmp=lambda x, y: cmp(x[0].start, y[0].start))
l1 = float(loc1[-1].end - loc1[0].start)
l2 = float(loc2[-1].end - loc2[0].start)
if loc2[-1].end > loc1[-1].end:
overlap = float(loc1[-1].end - loc2[0].start)
else:
overlap = l2
#logger.info("Pruning {} vs. {}".format(str(m1),str(m2)))
#logger.info("1: {}, 2: {}, overlap: {}".format(
# l1, l2, overlap))
#logger.info("Gene {} count {}, gene {} count {}".format(
# str(gene1), gene_count[gene1], str(gene2), gene_count[gene2]
# ))
#
prune_overlap = prune["overlap"]["fraction"]
if overlap / l1 < prune_overlap and overlap / l2 < prune_overlap:
logger.debug(
"Not pruning because fraction of overlap is too small!"
)
continue
w1 = 0.0
w2 = 0.0
for d in prune["overlap"]["weights"]:
logger.debug("Pruning overlap: %s", d)
tmp_w1 = -mc.get_weight(m1)
tmp_w2 = -mc.get_weight(m2)
m = max((tmp_w1, tmp_w2))
if m > 0:
w1 += tmp_w1 / max((tmp_w1, tmp_w2))
w2 += tmp_w2 / max((tmp_w1, tmp_w2))
if w1 >= w2:
logger.info("Discarding %s", gene2)
discard[gene2] = 1
else:
logger.info("Discarding %s", gene1)
discard[gene1] = 1
logger.info("Done calling transcripts for %s", chrom)
result = [v for m, v in models.items() if not m in discard]
#print "VV", result
return [[name, [e.to_flat_exon() for e in exons]]
for name, exons in result]
except:
logger.exception("Error on %s", chrom)
return []
def empty_db(tmpdir):
from pita.annotationdb import AnnotationDb
conn = "sqlite:///{}/pita_test.db".format(tmpdir)
with AnnotationDb(conn=conn, new=True) as d:
yield d
def db(tmpdir, index_dir):
from pita.annotationdb import AnnotationDb
conn = "sqlite:///{}/pita_test_database.db".format(tmpdir)
db = AnnotationDb(conn=conn, new=True, index=index_dir)
return db
def get_chrom_models(conn, chrom, weight, repeats=None, prune=None, keep=None, filter_ev=None, experimental=None):
if keep is None:
keep = []
if filter_ev is None:
filter_ev = []
if experimental is None:
experimental = []
logger = logging.getLogger("pita")
logger.debug(str(weight))
try:
db = AnnotationDb(conn=conn)
# Filter repeats
if repeats:
for x in repeats:
db.filter_repeats(chrom, x)
for ev in filter_ev:
db.filter_evidence(chrom, ev, experimental)
mc = DbCollection(db, weight, prune=prune, chrom=chrom)
# Remove short introns
#mc.filter_short_introns()
models = {}
exons = {}
logger.info("Calling transcripts for %s", chrom)
for model in mc.get_best_variants(weight):
genename = "{0}:{1}-{2}_".format(
model[0].chrom,
model[0].start,
model[-1].end,
)
logger.info("Best model: %s with %s exons",
genename, len(model))
models[genename] = [genename, model]
for exon in model:
exons[str(exon)] = [exon, genename]
discard = {}
if prune:
logger.debug("Prune: {0}".format(prune))
overlap = get_overlapping_models([x[0] for x in exons.values()])
if len(overlap) > 1:
logger.info("%s overlapping exons", len(overlap))
# logger.warn("Overlap: {0}".format(overlap))
gene_count = {}
for e1, e2 in overlap:
gene1 = exons[str(e1)][1]
gene2 = exons[str(e2)][1]
gene_count[gene1] = gene_count.setdefault(gene1, 0) + 1
gene_count[gene2] = gene_count.setdefault(gene2, 0) + 1
for e1, e2 in overlap:
gene1 = exons[str(e1)][1]
gene2 = exons[str(e2)][1]
if not(gene1 in discard or gene2 in discard):
m1 = models[gene1][1]
m2 = models[gene2][1]
loc1,loc2 = sorted([m1, m2], cmp=lambda x,y: cmp(x[0].start, y[0].start))
l1 = float(loc1[-1].end - loc1[0].start)
l2 = float(loc2[-1].end - loc2[0].start)
if loc2[-1].end > loc1[-1].end:
overlap = float(loc1[-1].end - loc2[0].start)
else:
overlap = l2
#logger.info("Pruning {} vs. {}".format(str(m1),str(m2)))
#logger.info("1: {}, 2: {}, overlap: {}".format(
# l1, l2, overlap))
#logger.info("Gene {} count {}, gene {} count {}".format(
# str(gene1), gene_count[gene1], str(gene2), gene_count[gene2]
# ))
#
prune_overlap = prune["overlap"]["fraction"]
if overlap / l1 < prune_overlap and overlap / l2 < prune_overlap:
logger.debug("Not pruning because fraction of overlap is too small!")
continue
w1 = 0.0
w2 = 0.0
for d in prune["overlap"]["weights"]:
logger.debug("Pruning overlap: %s", d)
tmp_w1 = -mc.get_weight(m1)
tmp_w2 = -mc.get_weight(m2)
m = max((tmp_w1, tmp_w2))
if m > 0:
w1 += tmp_w1 / max((tmp_w1, tmp_w2))
w2 += tmp_w2 / max((tmp_w1, tmp_w2))
if w1 >= w2:
logger.info("Discarding %s", gene2)
discard[gene2] = 1
else:
logger.info("Discarding %s", gene1)
discard[gene1] = 1
logger.info("Done calling transcripts for %s", chrom)
result = [v for m,v in models.items() if not m in discard]
#print "VV", result
return [[name, [e.to_flat_exon() for e in exons]] for name, exons in result]
except:
logger.exception("Error on %s", chrom)
return []
def db():
from pita.annotationdb import AnnotationDb
db = AnnotationDb(conn="sqlite:///pita_test_database.db", new=True)
return db
