python面向对象之property装饰器

property装饰器

property装饰器：将一个函数功能伪装成一个数据属性
版本一：

class Foo:
def init(self, name, age):
self.__name = name
self.age = age

@property
def name(self):
return self.__name #obj.name访问的是self.__NAME(这也是真实值的存放位置)

@name.setter
def name(self, v):
if type(v) is not str:
print("必须是str类型")
return
self.__name = v
@name.deleter
def name(self):
print("不能删除")

obj = People('ly', 18)
print(obj.name)
print(obj.get_name)
obj.set_name('EGON')
obj.name = 'x'
print(obj.name)
del obj.name

版本二：

class People():
__country = 'CHINA' # _People__country
def init(self, name, age):
self.__name = name
self.age = age
def get_name(self):
return self.__name

def set_name(self, v):
if type(v) is not str:
print("必须是str类型")
return
self.__name = v

def del_name(self):
print("不能删除")

这样写， 必须按照这个顺序

xxx = property(get_name, set_name, del_name)

obj = People('ly', 18)
print(obj.xxx)
obj.xxx = 'EGON'
print(obj.xxx)
del obj.xxx