__name__ is the attribute's name.

__doc__ is the attribute's docstring.

__get__(object) is a method that retrieves the attribute value from object.

__set__(object, value) sets the attribute on object to value.

__delete__(object, value) deletes the value attribute of object.

Python .x中默认都是经典类，只有显式继承了object才是新式类

python .x中默认都是新式类,经典类被移除，不必显式的继承object

#!/usr/bin/env python3

#coding:utf-

'''

    新式类和经典类的区别, 多继承代码演示

'''

class A:

    def __init__(self):

        print 'this is A'

    def save(self):

        print 'save method from A'

class B:

    def __init__(self):

        print 'this is B'

class C:

    def __init__(self):

        print 'this is c'

    def save(self):

        print 'save method from C'

class D(B, C):

    def __init__(self):

        print 'this is D'

d = D()

d.save()