def _create_hsp(hid, qid, psl):
"""Create high scoring pair object (PRIVATE)."""
# protein flag
is_protein = _is_protein(psl)
# strand
# if query is protein, strand is 0
if is_protein:
qstrand = 0
else:
qstrand = 1 if psl["strand"][0] == "+" else -1
# try to get hit strand, if it exists
try:
hstrand = 1 if psl["strand"][1] == "+" else -1
except IndexError:
hstrand = 1 # hit strand defaults to plus
blocksize_multiplier = 3 if is_protein else 1
# query block starts
qstarts = _reorient_starts(psl["qstarts"], psl["blocksizes"], psl["qsize"],
qstrand)
# hit block starts
if len(psl["strand"]) == 2:
hstarts = _reorient_starts(
psl["tstarts"],
[blocksize_multiplier * i
for i in psl["blocksizes"]], psl["tsize"], hstrand)
else:
hstarts = psl["tstarts"]
# set query and hit coords
# this assumes each block has no gaps (which seems to be the case)
assert len(qstarts) == len(hstarts) == len(psl["blocksizes"])
query_range_all = list(
zip(qstarts, [x + y for x, y in zip(qstarts, psl["blocksizes"])]))
hit_range_all = list(
zip(hstarts, [
x + y * blocksize_multiplier
for x, y in zip(hstarts, psl["blocksizes"])
]))
# check length of sequences and coordinates, all must match
if "tseqs" in psl and "qseqs" in psl:
assert len(psl["tseqs"]) == len(psl["qseqs"]) == \
len(query_range_all) == len(hit_range_all)
else:
assert len(query_range_all) == len(hit_range_all)
frags = []
# iterating over query_range_all, but hit_range_all works just as well
for idx, qcoords in enumerate(query_range_all):
hseqlist = psl.get("tseqs")
hseq = "" if not hseqlist else hseqlist[idx]
qseqlist = psl.get("qseqs")
qseq = "" if not qseqlist else qseqlist[idx]
frag = HSPFragment(hid, qid, hit=hseq, query=qseq)
# set alphabet
frag.alphabet = generic_dna
# set coordinates
frag.query_start = qcoords[0]
frag.query_end = qcoords[1]
frag.hit_start = hit_range_all[idx][0]
frag.hit_end = hit_range_all[idx][1]
# and strands
frag.query_strand = qstrand
frag.hit_strand = hstrand
frags.append(frag)
# create hsp object
hsp = HSP(frags)
# check if start and end are set correctly
assert hsp.query_start == psl["qstart"]
assert hsp.query_end == psl["qend"]
assert hsp.hit_start == psl["tstart"]
assert hsp.hit_end == psl["tend"]
# and check block spans as well
hit_spans = [span / blocksize_multiplier for span in hsp.hit_span_all]
assert hit_spans == hsp.query_span_all == psl["blocksizes"]
# set its attributes
hsp.match_num = psl["matches"]
hsp.mismatch_num = psl["mismatches"]
hsp.match_rep_num = psl["repmatches"]
hsp.n_num = psl["ncount"]
hsp.query_gapopen_num = psl["qnuminsert"]
hsp.query_gap_num = psl["qbaseinsert"]
hsp.hit_gapopen_num = psl["tnuminsert"]
hsp.hit_gap_num = psl["tbaseinsert"]
hsp.ident_num = psl["matches"] + psl["repmatches"]
hsp.gapopen_num = psl["qnuminsert"] + psl["tnuminsert"]
hsp.gap_num = psl["qbaseinsert"] + psl["tbaseinsert"]
hsp.query_is_protein = is_protein
hsp.ident_pct = 100.0 - _calc_millibad(psl, is_protein) * 0.1
hsp.score = _calc_score(psl, is_protein)
# helper flag, for writing
hsp._has_hit_strand = len(psl["strand"]) == 2
return hsp
def _create_hsp(hid, qid, psl):
# protein flag
is_protein = _is_protein(psl)
# strand
#if query is protein, strand is 0
if is_protein:
qstrand = 0
else:
qstrand = 1 if psl['strand'][0] == '+' else -1
# try to get hit strand, if it exists
try:
hstrand = 1 if psl['strand'][1] == '+' else -1
except IndexError:
hstrand = 1 # hit strand defaults to plus
# query block starts
qstarts = _reorient_starts(psl['qstarts'], \
psl['blocksizes'], psl['qsize'], qstrand)
# hit block starts
if len(psl['strand']) == 2:
hstarts = _reorient_starts(psl['tstarts'], \
psl['blocksizes'], psl['tsize'], hstrand)
else:
hstarts = psl['tstarts']
# set query and hit coords
# this assumes each block has no gaps (which seems to be the case)
assert len(qstarts) == len(hstarts) == len(psl['blocksizes'])
query_range_all = zip(qstarts, [x + y for x, y in \
zip(qstarts, psl['blocksizes'])])
hit_range_all = zip(hstarts, [x + y for x, y in \
zip(hstarts, psl['blocksizes'])])
# check length of sequences and coordinates, all must match
if 'tseqs' in psl and 'qseqs' in psl:
assert len(psl['tseqs']) == len(psl['qseqs']) == \
len(query_range_all) == len(hit_range_all)
else:
assert len(query_range_all) == len(hit_range_all)
frags = []
# iterating over query_range_all, but hit_range_all works just as well
for idx, qcoords in enumerate(query_range_all):
hseqlist = psl.get('tseqs')
hseq = '' if not hseqlist else hseqlist[idx]
qseqlist = psl.get('qseqs')
qseq = '' if not qseqlist else qseqlist[idx]
frag = HSPFragment(hid, qid, hit=hseq, query=qseq)
# set alphabet
frag.alphabet = generic_dna
# set coordinates
frag.query_start = qcoords[0]
frag.query_end = qcoords[1]
frag.hit_start = hit_range_all[idx][0]
frag.hit_end = hit_range_all[idx][1]
# and strands
frag.query_strand = qstrand
frag.hit_strand = hstrand
frags.append(frag)
# create hsp object
hsp = HSP(frags)
# check if start and end are set correctly
assert hsp.query_start == psl['qstart']
assert hsp.query_end == psl['qend']
assert hsp.hit_start == psl['tstart']
assert hsp.hit_end == psl['tend']
# and check block spans as well
assert hsp.query_span_all == hsp.hit_span_all == psl['blocksizes']
# set its attributes
hsp.match_num = psl['matches']
hsp.mismatch_num = psl['mismatches']
hsp.match_rep_num = psl['repmatches']
hsp.n_num = psl['ncount']
hsp.query_gapopen_num = psl['qnuminsert']
hsp.query_gap_num = psl['qbaseinsert']
hsp.hit_gapopen_num = psl['tnuminsert']
hsp.hit_gap_num = psl['tbaseinsert']
hsp.ident_num = psl['matches'] + psl['repmatches']
hsp.gapopen_num = psl['qnuminsert'] + psl['tnuminsert']
hsp.gap_num = psl['qbaseinsert'] + psl['tbaseinsert']
hsp.query_is_protein = is_protein
hsp.ident_pct = 100.0 - _calc_millibad(psl, is_protein) * 0.1
hsp.score = _calc_score(psl, is_protein)
# helper flag, for writing
hsp._has_hit_strand = len(psl['strand']) == 2
return hsp
def _create_hsp(hid, qid, psl):
# protein flag
is_protein = _is_protein(psl)
# strand
# if query is protein, strand is 0
if is_protein:
qstrand = 0
else:
qstrand = 1 if psl['strand'][0] == '+' else -1
# try to get hit strand, if it exists
try:
hstrand = 1 if psl['strand'][1] == '+' else -1
except IndexError:
hstrand = 1 # hit strand defaults to plus
# query block starts
qstarts = _reorient_starts(psl['qstarts'], psl['blocksizes'], psl['qsize'],
qstrand)
# hit block starts
if len(psl['strand']) == 2:
hstarts = _reorient_starts(psl['tstarts'], psl['blocksizes'],
psl['tsize'], hstrand)
else:
hstarts = psl['tstarts']
# set query and hit coords
# this assumes each block has no gaps (which seems to be the case)
assert len(qstarts) == len(hstarts) == len(psl['blocksizes'])
query_range_all = list(
zip(qstarts, [x + y for x, y in zip(qstarts, psl['blocksizes'])]))
hit_range_all = list(
zip(hstarts, [x + y for x, y in zip(hstarts, psl['blocksizes'])]))
# check length of sequences and coordinates, all must match
if 'tseqs' in psl and 'qseqs' in psl:
assert len(psl['tseqs']) == len(psl['qseqs']) == \
len(query_range_all) == len(hit_range_all)
else:
assert len(query_range_all) == len(hit_range_all)
frags = []
# iterating over query_range_all, but hit_range_all works just as well
for idx, qcoords in enumerate(query_range_all):
hseqlist = psl.get('tseqs')
hseq = '' if not hseqlist else hseqlist[idx]
qseqlist = psl.get('qseqs')
qseq = '' if not qseqlist else qseqlist[idx]
frag = HSPFragment(hid, qid, hit=hseq, query=qseq)
# set alphabet
frag.alphabet = generic_dna
# set coordinates
frag.query_start = qcoords[0]
frag.query_end = qcoords[1]
frag.hit_start = hit_range_all[idx][0]
frag.hit_end = hit_range_all[idx][1]
# and strands
frag.query_strand = qstrand
frag.hit_strand = hstrand
frags.append(frag)
# create hsp object
hsp = HSP(frags)
# check if start and end are set correctly
assert hsp.query_start == psl['qstart']
assert hsp.query_end == psl['qend']
assert hsp.hit_start == psl['tstart']
assert hsp.hit_end == psl['tend']
# and check block spans as well
assert hsp.query_span_all == hsp.hit_span_all == psl['blocksizes']
# set its attributes
hsp.match_num = psl['matches']
hsp.mismatch_num = psl['mismatches']
hsp.match_rep_num = psl['repmatches']
hsp.n_num = psl['ncount']
hsp.query_gapopen_num = psl['qnuminsert']
hsp.query_gap_num = psl['qbaseinsert']
hsp.hit_gapopen_num = psl['tnuminsert']
hsp.hit_gap_num = psl['tbaseinsert']
hsp.ident_num = psl['matches'] + psl['repmatches']
hsp.gapopen_num = psl['qnuminsert'] + psl['tnuminsert']
hsp.gap_num = psl['qbaseinsert'] + psl['tbaseinsert']
hsp.query_is_protein = is_protein
hsp.ident_pct = 100.0 - _calc_millibad(psl, is_protein) * 0.1
hsp.score = _calc_score(psl, is_protein)
# helper flag, for writing
hsp._has_hit_strand = len(psl['strand']) == 2
return hsp