def get_important_keyphrases_from_single_doc_yahoo(self, corpus_text, min_len=3, max_len=20):
api = YahooAPI(YAHOO_APP_KEY)
keywords = []
res = api.keyphrases(corpus_text)
for phrase, s in res.iteritems():
kanjimatch = re.search(KANJI, phrase, re.U)
hiramatch = re.search(HIRA, phrase, re.U)
katamatch = re.search(KATA, phrase, re.U)
if not kanjimatch and not hiramatch and not katamatch:
continue
freq = self.phrase_frequency(phrase, corpus_text)
if (freq > 0) and (len(phrase) >= min_len) and (len(phrase) <= max_len) and (phrase not in self.stoplist) and (phrase.lower() != self.query.lower()):
kw = Keyword(phrase, float(s)/101, freq)
if kw not in keywords:
keywords.append(kw)
keywords.sort(key=lambda x: x.score, reverse=True)
return keywords[:min(len(keywords), self.numberofkeywords)]
