13.11.1 __bases__类属性:

13.11.1 __bases__类属性:

在第13.4.4 节中,我们概要地介绍了__bases__类属性,对任何(子)类,它是一个包含其父类(parent)的集合的元组。

# !/usr/bin/env python
# -*- coding: utf-8 -*-
class A(object):   # define class A 定义类 A
    pass
print A.__bases__

C:Python27python.exe C:/Users/TLCB/PycharmProjects/untitled/eeeee/a8.py
(<type 'object'>,)


# !/usr/bin/env python
# -*- coding: utf-8 -*-
class A(object):   # define class A 定义类 A
    pass
print A.__bases__


class B(A):  # subclass of A A 的子类
    pass
print B.__bases__

C:Python27python.exe C:/Users/TLCB/PycharmProjects/untitled/eeeee/a8.py
(<type 'object'>,)
(<class '__main__.A'>,)
  
  
# !/usr/bin/env python
# -*- coding: utf-8 -*-
class A(object):   # define class A 定义类 A
    pass
# print A.__bases__


class B(A):  # subclass of A A 的子类
    pass
# print B.__bases__


class C(B):  # subclass of B (and indirectly, A) B 的子类（A 的间接子类）
    pass
print C.__bases__

C:Python27python.exe C:/Users/TLCB/PycharmProjects/untitled/eeeee/a8.py
(<class '__main__.B'>,)