#!/usr/bin/env python

 #coding=utf-8

 #

 # 工厂模式一例

 # 版权所有 2014 yao_yu (http://blog.csdn.net/yao_yu_126)

 # 本代码以MIT许可协议发布

 # 2014-04-22

 # 

 class Cube(object):

     pass

 class Cuboid(object):

     pass

 class Cylinder(object):

     pass

 class Sphere(object):

     pass

 class ObjectFactory(dict):

     def register(self, klass):

         klass_name = klass.__name__

         if klass_name not in self:

             self[klass_name] = klass

     def create(self, klass_name):

         if klass_name in self:

             return self[klass_name]

 object_factory = ObjectFactory()

 for klass in (Cube, Cuboid, Cylinder, Sphere):

     object_factory.register(klass)

 if __name__ == '__main__':

     def main():

         for klass in (Cube, Cuboid, Cylinder, Sphere):

             obj = object_factory.create(klass.__name__)()

             print(obj.__class__.__name__)

     main()