python 三元组找上下位相同的词

import jiebaimport nltkf=open("corpus.txt", 'r', encoding='utf-8',)sents=[]for line in f:    sents.extend(jieba.cut(line.strip()))finder=nltk.collocations.TrigramCollocationFinder .from_words(sents)bigram_measures=nltk.collocations.BigramAssocMeasures()resu=sorted(finder.ngram_fd.items(), key=lambda t: (-t[1], t[0]))[:100]tuples = []for x in resu:    for y in resu:        if x[0][0]==y[0][0] and x[0][2]==y[0][2] and x[0][1]!=y[0][1] :            if [y[0][1],x[0][1]] in tuples:                break            tuples.append([x[0][1],y[0][1]])            print(x[0][1]+"=="+y[0][1])tuples