# !/usr/bin/env python
# -*- coding: utf-8 -*-
class ClassicClassWithoutSuperclasses:
  def fun1(self):
    print 'aaaaaaa'
a=ClassicClassWithoutSuperclasses()
print a
print type(a)
print a.fun1()

class Parent(object): # define parent class 定义父类
 def parentMethod(self):
  print 'calling parent method

# !/usr/bin/env python
# -*- coding: utf-8 -*-
class Parent(object): # define parent class 定义父类
 def parentMethod(self):
  print 'calling parent method'
class Child(Parent): # define child class 定义子类
 def childMethod(self):
  print 'calling child method'
a=Parent() # instance of parent 父类的实例
print a.parentMethod()

> c = Child() # instance of child 子类的实例
> c.childMethod() # child calls its method 子类调用它的方法
calling child method
> c.parentMethod() # calls parent's method 调用父类的方法
calling parent method