本文整理匯總了Python中nltk.metrics.BigramAssocMeasures方法的典型用法代碼示例。如果您正苦於以下問題：Python metrics.BigramAssocMeasures方法的具體用法？Python metrics.BigramAssocMeasures怎麽用？Python metrics.BigramAssocMeasures使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類nltk.metrics的用法示例。
在下文中一共展示了metrics.BigramAssocMeasures方法的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Python代碼示例。
示例1: collocations
# 需要導入模塊: from nltk import metrics [as 別名]
# 或者: from nltk.metrics import BigramAssocMeasures [as 別名]
def collocations(self, num=20, window_size=2):
"""
Print collocations derived from the text, ignoring stopwords.
:seealso: find_collocations
:param num: The maximum number of collocations to print.
:type num: int
:param window_size: The number of tokens spanned by a collocation (default=2)
:type window_size: int
"""
if not ('_collocations' in self.__dict__ and self._num == num and self._window_size == window_size):
self._num = num
self._window_size = window_size
#print("Building collocations list")
from nltk.corpus import stopwords
ignored_words = stopwords.words('english')
finder = BigramCollocationFinder.from_words(self.tokens, window_size)
finder.apply_freq_filter(2)
finder.apply_word_filter(lambda w: len(w) < 3 or w.lower() in ignored_words)
bigram_measures = BigramAssocMeasures()
self._collocations = finder.nbest(bigram_measures.likelihood_ratio, num)
colloc_strings = [w1+' '+w2 for w1, w2 in self._collocations]
print(tokenwrap(colloc_strings, separator="; "))