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python - 我怎么能这样写for语句：因为我不在x中

问题描述

对于词分类，我定义了正面和负面词汇，我想识别中性词（有无穷多个中性词）

所以我这样做了：

def word_feats(word): 
return {word: True}   
voc_pos = [ 'beauty', 'good', 'happy']    
voc_neg = [ 'bad', 'sick','lazy']    
voc = voc_pos + voc_neg    
pos_feats = [(word_feats(pos), 'pos') for pos in voc_pos]     
neg_feats = [(word_feats(neg), 'neg')for neg in voc_neg]    
neu_feats = [(word_feats(neu), 'neu')for neu not in voc]

错误是：

"invalid syntax" for neu_feats = [(word_feats(neu), 'neu')for neu not in voc]

标签： pythonnltk

解决方案

继续@blue_note 的回答：

使用zip_longest()：

def word_feats(word):
        return {word: True}

voc_pos = [ 'beauty', 'good', 'happy']
voc_neg = [ 'bad', 'sick','lazy']
voc = voc_pos + voc_neg

mylist = ['book']

pos_feats = [(word_feats(pos), 'pos') for pos in voc_pos]
neu_feats = [(word_feats(neu), 'neu') for neu in mylist if neu not in voc]
neg_feats = [(word_feats(neg), 'neg') for neg in voc_neg]

print([*zip_longest(pos_feats, neu_feats, neg_feats)])

输出：

[(({'beauty': True}, 'pos'), ({'book': True}, 'neu'), ({'bad': True}, 'neg')), (({'good': True}, 'pos'), None, ({'sick': True}, 'neg')), (({'happy': True}, 'pos'), None, ({'lazy': True}, 'neg'))]

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