In [2]: from collections import defaultdict
In [3]: a = defaultdict(dict)
In [4]: a['hell']['good']= 1
In [5]: a
Out[5]: defaultdict(<type 'dict'>, {'hell': {'good': 1}})Python生成字典嵌套
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转载自blog.csdn.net/wu0che28/article/details/81462538
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