原型模式（python）

原型模式也叫克隆模式，通过拷贝自身的属性来创建一个新的对象，基本方法就是调用copy模块下的 （浅拷贝）copy() 和（深拷贝）deepcopy()

#!/usr/bin/env python3
# -*- coding:utf-8 -*-
# prototype.py
# author baiyifengyun
import copy
from datetime import date

"""
原型模式：克隆羊多莉

"""

class Prototype:

    def __init__(self):
        self._objects = {}

    def register_object(self, name, obj):
        self._objects[name] = obj

    def unregister_object(self, name):
        del self._objects[name]

    def clone(self, name, **attrs):
        obj = copy.deepcopy(self._objects.get(name))
        obj.__dict__.update(attrs)
        return obj

class Sheep:
    def __init__(self):
        self.name = '多莉'
        self.birthday = date.fromtimestamp(132887776)

    def showInfo(self):
        return f'我是{self.name},出生于{self.birthday}'

def main():
    s = Sheep()
    prototype = Prototype()
    prototype.register_object('s', s)
    s1 = prototype.clone('s')
    s1.name = '多莉莉'
    s1.birthday = date.fromtimestamp(1439876233)
    print('原型体：', s.showInfo())
    print('克隆体为', s1.showInfo())

if __name__ == "__main__":
    main()

结果为：

来自为知笔记(Wiz)