NLTK. Ex 2.18 Write a program to print the 50 most frequent bigrams (pairs of adjacent words) of a text, omitting bigrams that contain stopwords.
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| def top_bigrams(text): | |
| fdist = nltk.probability.FreqDist(nltk.bigrams(text)) #формируем список кортежей биграмм | |
| stopwords = nltk.corpus.stopwords.words('english') #формируем стоплист | |
| top_list = [(x,y) for x,y in fdist.keys() if x.isalpha() and y.isalpha() and x not in stopwords and y not in stopwords] #показываем только если элементы кортежа - слова и невходят в стоплист | |
| return top_list |
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