**class User:
def __new__(cls, *args, **kwargs):
print("this is new method=====")
instance=object.__new__(User)
return instance
def __init__(self,name,age):
self.name=name
self.age=age
print("this is init methond==========")
User("zhangsan",18)**
关于is 与等号
等号判断内容是否相同
is判定内存是否相同
eg
a=1
b=1
ab
a is b
结果都是Ture
a=1
b=1.0
ab
a is b
结果：
a==b 是Ture
a is b 是 False