#!/usr/bin/env python
# -*- coding: utf-8 -*-
class A(object):
def __init__(self):
self.s = []
class B(object):
def __init__(self):
self.a = A()
class C(object):
def __init__(self):
self.b = B()
c = C()
print c.b.a.s
c.b.a.s.append(1)
c.b.a.s.append(2)
c.b.a.s.append(3)
c.b.a.s.append(4)
c.b.a.s.append(5)
print c.b.a.s
while c.b.a.s:
print c.b.a.s.pop()
print c.b.a.s
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