区别于空字典
In [14]: s = set()
In [15]: s
Out[15]: set()
In [16]: type(s)
Out[16]: set
In [17]: s = {}
In [18]: type(s)
Out[18]: dict
In [19]: s
Out[19]: {}
微信扫一扫
In [14]: s = set()
In [15]: s
Out[15]: set()
In [16]: type(s)
Out[16]: set
In [17]: s = {}
In [18]: type(s)
Out[18]: dict
In [19]: s
Out[19]: {}
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