Python 设计模式—原型模式

import copy
from collections import OrderedDict

#定义一个人的类
class Person():
    def __init__(self,name,age,high,sex,**info):
        self.name=name
        self.age=age
        self.high=high
        self.sex=sex
        #可以为实例添加其他额外属性，但必须是key:value格式的属性
        self.__dict__.update(info)

    #当使用print输出对象的时候，只要自己定义了__str__(self)方法，那么就会打印从在这个方法中return的数据
    def __str__(self):
        myinfo=[]
        #OrderedDict 是 collections 提供的一种数据结构， 它提供了有序的dict结构。
        order_dict=OrderedDict(self.__dict__.items())
        for i in order_dict.keys():
            myinfo.append('{}:{}'.format(i,order_dict[i]))
            myinfo.append('\n')
        return ''.join(myinfo)

class Prototype():
    def __init__(self):
        self.objects=dict() #定义原型对象字典表

    #在原型字典表中注册原型对象
    def register(self,id,obj):
        self.objects[id]=obj

    #在原型字典表中删除原型对象
    def destory(self,id):
        del self.objects[id]

    #根据 id 在原型字典表中查找原型对象并克隆
    def clone(self,id,**atter):
        obj1=self.objects.get(id)
        print(obj1)
        if not obj1:
            raise ValueError('Incorrect object id: {}'.format(id))
        obj2=copy.deepcopy(obj1)
        obj2.__dict__.update(atter)
        return obj2


if __name__ == '__main__':
    tony=Person('tony',34,170,'man',job='tester',birthday='2000-01-01',hobby='catch fish')
    print(tony)

    prototype=Prototype()
    prototype.register(1001,tony)
    tom=prototype.clone(1001,name='tom',age='19',birthday='2010-02-02')

    for i in (tony,tom):
        print(i)
    #输出两个Person对象是否是相同的id值
    print("id tony : {} != id tom : {}".format(id(tony), id(tom)))

name:tony
age:34
high:170
sex:man
job:tester
birthday:2000-01-01
hobby:catch fish

name:tony
age:34
high:170
sex:man
job:tester
birthday:2000-01-01
hobby:catch fish

name:tony
age:34
high:170
sex:man
job:tester
birthday:2000-01-01
hobby:catch fish

name:tom
age:19
high:170
sex:man
job:tester
birthday:2010-02-02
hobby:catch fish

id tony : 2930225522448 != id tom : 2930225522504