dict' object has no attribut

作者: 腿长袖子短 | 来源:发表于2017-12-22 09:30 被阅读290次

在python2中对于一个dict,可以用dict.has_key(key_name)检测键是否存在
在python3中这样使用会报错AttributeError: 'dict' object has no attribute 'has_key'
python3 用法:

words = {'a':1, 'b':2 , 'c':3}
'a' in words

dict' object has no attribut
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