#!/usr/bin/env python# polymorphism in python#class base(object):  """base class"""  def __init__(self, name):    self.name = name  def printest(self):    print "base class: ", self.nameclass subclass1(base):  """sub class 1"""  def printest(self):    print "sub class 1: ", self.nameclass subclass2(base):  """sub class 2"""  def printest(self):    print "sub class 2: ", self.nameclass subclass3(base):  """sub class 3"""  passdef testFunc(o):  o.printest()if __name__ == "__main__":  testFunc(subclass1("1"))  testFunc(subclass2("2"))  testFunc(subclass3("3"))