from types import  MethodType#創建一個空類
class Person(object):__slots__ = ("name","age","speak","height")per = Person()
#動態添加屬性，這體現了動態語言的特點(靈活）per.name = "tom"
print(per.name)
'''
#動態添加方法
def say(self):print("my name is "+self.name)
per.speak = say
per.speak()
'''def say(self):print("my name is "+self.name)
per.speak = MethodType(say,per)
per.speak()#思考：如果我們想要限制實力的屬性怎么辦
#比如：只允許給對象添加 name,age,height,weight屬性#解決：定義類的時候，定義一個特殊的屬性（__slots__)
#可以限制動態添加的屬性
per.height = 100
print(per.height)

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