class Goods(object):

    @property

    def size(self):

        return 100

obj = Goods()

ret = obj.size   # 调用属性

print(ret)

class Pager(object):

    def __init__(self, current_page):

        # 用户当前请求的页码(第一页,第二页....)

        self.current_page = current_page

        # 每页默认显示10条数据

        self.per_items = 10

    @property

    def start(self):

        val = (self.current_page - 1) * self.per_items

        return val

    @property

    def end(self):

        val = self.current_page * self.per_items

        return val

p = Pager(1)

print(p.start)    # 就是起始值，即 m

print(p.end)      # 就是结束值，即 n

class Goods(object):

    @property

    def gname(self):

        return "douzi"

obj = Goods()

ret = obj.gname   # 自动执行 @property 修饰的price方法，并获取方法的返回值

print(ret)

class Goods(object):

    """

    python3 里面才有 @xxx.setter, @xxx.deleter

    python2 里面只有 @property

    """

    @property

    def gname(self):

        return "@property"

    @gname.setter

    def gname(self, value):

        print("@gname.setter", value)

    @gname.deleter

    def gname(self):

        print("@gname.deleter")

obj = Goods()

ret = obj.gname      # 自动执行 @property 修饰的price方法，并获取方法的返回值

print(ret)

obj.gname = "cute"   # 自动执行 @gname.setter 修饰的price方法，并将 123 赋值给方法参数

del obj.gname        # 删除obj名字

@property

@gname.setter cute

@gname.deleter

#!/usr/bin/python3

#-*- coding:utf-8 -*-

class Foo(object):

    def get_bar(self):

        return "douzi"

    BAR = property(get_bar) 

obj = Foo()

res = obj.BAR  # 自动调用get_bar方法, 并获取方法的返回值

print(res)

#!/usr/bin/python3

#-*- coding:utf-8 -*-

class Foo(object):

    def get_bar(self):

        print("getter....")

        return "douzi"

    def set_bar(self, value):

        """必须两个参数"""

        print("setter....", value)

    def del_bar(self):

        print("deleter...")

        return "del value"

    BAR = property(get_bar, set_bar, del_bar, "description....")

obj = Foo()

res = obj.BAR  # 自动调用get_bar方法, 并获取方法的返回值

print("getter....", res)

obj.BAR = "dou zi"

del obj.BAR

print(Foo.BAR.__doc__)

 #!/usr/bin/python3

 #-*- coding:utf-8 -*-

 class Money(object):

     def __init__(self):

         self.__money = 0

     def getMoney(self):

         return self.__money

     def setMoney(self, value):

         if isinstance(value, int):

             self.__money = value

         else:

             print("error: 不是整型数字")

     # 定义一个属性，当对这个money设置值时调用setMoney,获取值时调用getMoney

     money = property(getMoney, setMoney)

 a = Money()

 a.money = 100   # 调用setMoney

 print(a.money)  # 调用getMoney

#!/usr/bin/python3

#-*- coding:utf-8 -*-

class Money(object):

    def __init__(self):

        self.__money = 0

    @property

    def Money(self):

        return self.__money

    @Money.setter

    def Money(self, money):

        if isinstance(money, int):

            self.__money = money

        else:

            print("error: 不是整型数字")

a = Money()

a.money = 100   # 调用setMoney

print(a.money)  # 调用getMoney