类的属性控制

Posted 2022-08-25 liyanyan665

设置对象属性
__setattr__(self, name, value):
def __setattr__(self, name, value):
self.__dict__[name] = value
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查询对象属性
__getattr__(self, name): 访问这个属性时 , 在没有查找到相应实例属性时被调用
__getattribute__(self, name): 每次访问属性时被调用 , 更容易引起无限递归情况 , 使用时小心
详见getattr与getattribute
删除对象属性
__delattr__(self, name):
实例
class Program(object):

def __init__(self, name, age):
self.name = name
self.age = age

def __getattribute__(self, name):
# return getattr(self, name) # 引起无限递归
# return self.__dict__[name] # 引起无限递归
return super(Program, self).__getattribute__(name)

def __setattr__(self, name, value):
self.__dict__[name] = value

def __setattr__(self, age, value):
self.__dict__[age] = value

def __getattr__(self, age):
return super(Program, super).__getattr__(age)

if __name__ == ‘__main__‘:
p = Program(‘mike‘, 22)
print(p.name)
print(p.age)
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