Python中接口设计的相关包(zope.interface)

zope.interface安装包下载地址：https://pypi.python.org/pypi/zope.interface#downloads

使用zope.interface的实例：

#coding=utf8
from zope.interface import Interface, implements
class addClass:
    def add(self,a,b):
        """comments"""

class overAdd():
    implements(addClass)
    def add(self,a,b):
        print a+b

或者

#coding=utf8
from zope.interface import Interface, implements
class addClass:
    def add(self,a,b):
        """comments"""

@implementer(addClass):
class overAdd(): 
    def add(self,a,b):
        print a+b