def _gen_suffix(self,phrase):
terms = phrase
key = terms[0:SUFFIX_MIN_LENGTH]
for c in terms[SUFFIX_MIN_LENGTH:]:
yield (chinese_key(key), c, ord(c))
key = key + c
yield (chinese_key(phrase), self.terminator, 0)
def put(self,title,item_id):
"""
title --> segment --> sadd(phrase,item_id) -> zadd (phrase->prefix, suffix, 0)
--> pinyin --> sadd(phrase,item_id) -> zadd (phrase->prefix, suffix, 0)
"""
if not title or not item_id:
return
for phrase in mmseg.seg_txt(title.encode('utf8')):
if not phrase:
continue
phrase = phrase.decode('utf8')
self._add_phrase(chinese_key(phrase),item_id)
for (key,suffix,score) in self._gen_suffix(phrase):
self._add_suffix(key,chinese_key(suffix),score)
if not self.pinyin:
continue
phrase = self.pinyin.translate(phrase)
if not phrase:
continue
for sub_phrase in self._gen_pinyin_phrase(phrase):
self._add_phrase(sub_phrase,item_id)
for (key,suffix,score) in self._gen_suffix(re.sub('\\s+','',sub_phrase)):
self._add_suffix(key,suffix,score)
def remove(self,title,item_id):
if not title or not item_id:
return
for phrase in mmseg.seg_txt(title.encode('utf8')):
if not phrase:
continue
phrase = phrase.decode('utf8')
self._rem_phrase(chinese_key(phrase),item_id)
if not self.pinyin:
continue
phrase = self.pinyin.translate(phrase)
if not phrase:
continue
for sub_phrase in self._gen_pinyin_phrase(phrase):
self._rem_phrase(sub_phrase,item_id)
