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fix alllowPos logic in Textrank to be consistent with TF-IDF #494

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fix alllowPos logic in Textrank to be consistent with TF-IDF #494

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15 changes: 10 additions & 5 deletions jieba/analyse/textrank.py
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Original file line number Diff line number Diff line change
Expand Up @@ -62,9 +62,13 @@ def __init__(self):
self.pos_filt = frozenset(('ns', 'n', 'vn', 'v'))
self.span = 5

def pairfilter(self, wp):
return (wp.flag in self.pos_filt and len(wp.word.strip()) >= 2
and wp.word.lower() not in self.stop_words)
def pairfilter(self, wp, filt_pos=True):
if filt_pos == True:
return (wp.flag in self.pos_filt and len(wp.word.strip()) >= 2
and wp.word.lower() not in self.stop_words)
else:
return (len(wp.word.strip()) >= 2
and wp.word.lower() not in self.stop_words)

def textrank(self, sentence, topK=20, withWeight=False, allowPOS=('ns', 'n', 'vn', 'v'), withFlag=False):
"""
Expand All @@ -83,11 +87,12 @@ def textrank(self, sentence, topK=20, withWeight=False, allowPOS=('ns', 'n', 'vn
cm = defaultdict(int)
words = tuple(self.tokenizer.cut(sentence))
for i, wp in enumerate(words):
if self.pairfilter(wp):
filt_pos = True if self.pos_filt else False
if self.pairfilter(wp, filt_pos):
for j in xrange(i + 1, i + self.span):
if j >= len(words):
break
if not self.pairfilter(words[j]):
if not self.pairfilter(words[j], filt_pos):
continue
if allowPOS and withFlag:
cm[(wp, words[j])] += 1
Expand Down