#!/usr/local/bin/python2
import pickle

class C(object):
  def __init__(self, a):
    self.a = a

c = C(1)
z = pickle.dumps(c)
c2 = pickle.loads(z)
c3 = pickle.loads(z)
print id(c), id(c2), id(c3)

c2.a = 2
print c.a, c2.a, c3.a