def similarity2(a, b):
"""Calculates similarity of a multi-word strings."""
alist = filter(bool, _split_words_re.split(a.lower()))
blist = filter(bool, _split_words_re.split(b.lower()))
total = 0
score = 0.0
if len(alist) > len(blist):
alist, blist = blist, alist
for a in alist:
ms = 0.0
mp = None
for position, b in enumerate(blist):
s = astrcmp(a, b)
if s > ms:
ms = s
mp = position
if mp is not None:
score += ms
if ms > 0.6:
del blist[mp]
total += 1
total += len(blist) * 0.4
if total:
return score / total
else:
return 0
def similarity(a1, b1):
"""Calculates similarity of single words."""
# return astrcmp(a1, b1)
"""Calculates "smart" similarity of strings ``a`` and ``b``."""
a2 = normalize(a1)
if a2:
b2 = normalize(b1)
else:
b2 = ""
return astrcmp(a2, b2)