#__author__ = 'DouYunQian'

 #coding=utf-8

 '''

 Python??????????

 '''

 class C1:

     def __init__(self,name,obj):

         self.name=name

         self.obj=obj

 class C2:

     def __init__(self,name,age):

         self.name=name

         self.age=age

 N1=C2("alex",18)

 N2=C1("good",N1)

 print(N2.obj.age)