Class with in class in python -

i have classex.py file:

class class1:     def method1():         print 'stack1'     def method2():         print 'over1'     def method3():         print 'flow1'  class class2:     def method1():         print 'stack2'     def method2():         print 'over2'     def method3():         print 'flow2'  class class3:     def method1():         print 'stack3'     def method2():         print 'over3'     def method3():         print 'flow3' 

i want access classex file class import file how access in various classes .

for example:

import classex print class1.method1() print class2.method2() 

my expect output stack1 , over2

class class1:     def method1(self): # instance  passed implicity first arg         print 'stack1'     def method2(self):         print 'over1'     def method3(self):         print 'flow1'  class class2:     def method1(self):         print 'stack2'     def method2(self):         print 'over2'     def method3(self):         print 'flow2'  class class3:     def method1(self):         print 'stack3'     def method2(self):         print 'over3'     def method3(self):         print 'flow3' 

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>>> import classex >>> c = classex.class1() # instance of class1 >>> c.method1() stack1