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CP-5043:- added support for complete token match in partial_ratio #234

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CP-5043:- added support for complete token match in partial_ratio #234

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ecd4421
CP-5043:- added support for complete token match in partial_ratio
jasmeet7 May 1, 2019
969fc75
CP-5043:- test changes
jasmeet7 May 2, 2019
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18 changes: 16 additions & 2 deletions fuzzywuzzy/fuzz.py
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Expand Up @@ -27,6 +27,18 @@ def ratio(s1, s2):
m = SequenceMatcher(None, s1, s2)
return utils.intr(100 * m.ratio())

def get_token_start_index(longer, index):
for i in range(index, -1, -1):
if ' ' == longer[i]:
return (i+1)
return 0

def get_token_end_index(longer, index):
len_ = len(longer)
for i in range(index, len_):
if ' ' == longer[i]:
return (i-1)
return len_ - 1

@utils.check_for_none
@utils.check_for_equivalence
Expand All @@ -51,12 +63,14 @@ def partial_ratio(s1, s2):
# the best partial match will block align with at least one of those blocks
# e.g. shorter = "abcd", longer = XXXbcdeEEE
# block = (1,3,3)
# best score === ratio("abcd", "Xbcd")
# best score === ratio("abcd", "Xbcd")
scores = []
for block in blocks:
long_start = block[1] - block[0] if (block[1] - block[0]) > 0 else 0
long_start = get_token_start_index(longer, long_start)
long_end = long_start + len(shorter)
long_substr = longer[long_start:long_end]
long_end = get_token_end_index(longer, long_end)
long_substr = longer[long_start:long_end+1]

m2 = SequenceMatcher(None, shorter, long_substr)
r = m2.ratio()
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