Python: 设计模式 之 工厂模式例(1)

 #!/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()
             

输出结果

Cube
Cuboid
Cylinder
Sphere