映射setattr,getattr,delattr合集

之前写的，现在好像不可以用了

class Foo:
    def __init__(self):
        print("初始化")

    def __setattr__(self, key, value):
        """
        属性赋值操作时
        self.name = "33"
        f1.age = 11  # 属性不存在就创建
        setattr(f1, "name","张三")
        """
        print("调用%s方法"%("setattr"))
        print(key,value)

    def __delattr__(self, item):
        """
        删除属性的时候
        del f1.name
        del self.name
        delattr(f1, "namasssssssae")
        """
        print("调用%s方法" % ("delattr"))
        print(item)

    def __getattr__(self, item):
        """
        调用属性的时候
        self.name
        f1.name
        getattr(f1, "nameq")
        """
        print("调用%s方法"%("getattr"))
        print(item)

if __name__ == "__main__":
    f1 = Foo()

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映射类：怎么玩：

a = A()
A.__getattribute__(a,"name1")
a.__getattribute__("name1")
getattr(A,"name1")
getattr(a,"name1")

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