Python：对象的生命周期new-init-call-del

# -*- coding: utf-8 -*-
class Demo(object):
    # 创建 反回 类的实例对象
    def __new__(cls, *args, **kwargs):
        print("__new__")
        return super(Demo, cls).__new__(cls, *args, **kwargs)
    # 初始化 只能反回 None
    def __init__(self):
        print("__init__")
    # 使用
    def __call__(self, *args, **kwargs):
        print("__call__")
    # 垃圾回收
    def __del__(self):
        print("__del__")
if __name__ == '__main__':
    demo = Demo()
    demo()
"""
__new__
__init__
__call__
__del__
"""