Python的多态性实例分析

#!/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.name
class subclass1(base):
 """sub class 1"""
 def printest(self):
 print "sub class 1: ", self.name
class subclass2(base):
 """sub class 2"""
 def printest(self):
 print "sub class 2: ", self.name
class subclass3(base):
 """sub class 3"""
 pass
def testFunc(o):
 o.printest()
if __name__ == "__main__":
 testFunc(subclass1("1"))
 testFunc(subclass2("2"))
 testFunc(subclass3("3"))