python object.

class Man(object):
    __instance = None

    # 单例模式
    def __new__(cls, *args, **kwargs):
        print("调用__new__方法，为对象分配内存")
        if Man.__instance is None:
            Man.__instance = super().__new__(cls)  # 返回内存地址的引用给__init__的self
        return Man.__instance

    def __init__(self, name, age):
        print("调用__init__方法")
        self.name = name
        self.age = age



man = Man("张三", 18)
man2 = Man("李四", 18)

print(man is man2)