__new__()
2022-10-13 本文已影响0人
山猪打不过家猪
1. 实现一个简单的单例模式
class Test:
a = None
def __new__(cls,*args, **kwargs):
if cls.a ==None:
cls.a = super().__new__(cls)
return cls.a
player = Test()
player2 = Test()
player3 = Test()
player4 = Test()
print(player)
print(player2)
print(player3)
print(player4)
>>>
<__main__.Test object at 0x01ED1A30>
<__main__.Test object at 0x01ED1A30>
<__main__.Test object at 0x01ED1A30>
<__main__.Test object at 0x01ED1A30>
