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<!DOCTYPE HTML>
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<title>原型模式 · GitBook</title>
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Null 模式
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<a href="." >原型模式</a>
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<h1 id="python设计模式之原型模式"><a href="http://dongweiming.github.io/python-pototype.html"Permalink to python设计模式之原型模式"" target="_blank">python设计模式之原型模式</a></h1><h2 id="pototype模式">Pototype模式</h2><p>假如你爱玩游戏，你能想到游戏里面有很多的角色，但是其实你有没有注意:脸型，身材，眼睛..这些其实都是略有不同的搭配，
这也就是原型的作用：不需要你每次都制造一个复杂的人物，只是根据一个原型的人物做些简单的修改即可</p><h2 id="python的例子">python的例子</h2><pre><code># 这里肯定要做深拷贝，要不然python的就是对象的引用
from copy import deepcopy
class Prototype:
def __init__(self):
self._objs = {}
def registerObject(self, name, obj):
"""注册对象"""
self._objs[name] = obj
def unregisterObject(self, name):
"""取消注册"""
del self._objs[name]
def clone(self, name, **attr):
"""克隆对象"""
obj = deepcopy(self._objs[name])
# 但是会根据attr增加或覆盖原对象的属性
obj.__dict__.update(attr)
return obj
if __name__ == '__main__':
class A:
pass
a=A()
prototype=Prototype()
prototype.registerObject("a",a)
b=prototype.clone("a",a=1,b=2,c=3)
# 这里会返回对象a
print(a)
# 这里的对象其实已经被修改成(1, 2, 3)
print(b.a, b.b, b.c)</code></pre>
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