def _do_patching(self, t_app, tau, tau1, covered_pos, grounded_only):
(a,b) = tau
t_app = t_app.split()
if(any(a<=c<=b for c in covered_pos)):
return None, None
seg = ' '.join(t_app[a:b+1])
seg_left = ' '.join(t_app[:a])
seg_right = ' '.join(t_app[b+1:])
if grounded_only:
pe = PhraseExtractor(seg.lower(), tau1.lower())
aligns = pe.find_alignments()
if aligns == []:
return None, None
p = min(a[0] for a in aligns)
q = max(a[0] for a in aligns)
r = min(a[1] for a in aligns)
s = max(a[1] for a in aligns)
if p == q or r ==s or p != 0 or q != (b-a) or r != 0 or s != len(tau1.split())-1 :
return None, None
seg = tau1.split()
pe = PhraseExtractor(' '.join(t_app[a:b+1]).lower(), tau1.lower())
aligns = pe.find_alignments()
tg_aligns = [x for (_, x) in aligns]
cp = [a+i for i in range(len(seg)) if i not in tg_aligns]
cp += covered_pos
# print(cp)
if seg_left != '':
tau1 = tau1.lower()
return (seg_left + ' ' + tau1 + ' ' + seg_right).strip(), cp
