Python----面向对象---自定义元类控制类的实例化行为

 1 class Foo:
 2     def __call__(self, *args, **kwargs):
 3         print(self)
 4         print(args)
 5         print(kwargs)
 6 
 7 obj = Foo()
 8 obj()
 9 
10 结果为：
11 
12 <__main__.Foo object at 0x000002AFE2B4BDA0>
13 ()
14 {}

1 obj(1, 2, 3, a=1, b=2, c=3)
2 
3 结果为:
4 
5 <__main__.Foo object at 0x000001A1799CBDA0>
6 (1, 2, 3)
7 {‘a‘: 1, ‘b‘: 2, ‘c‘: 3}