python链式调用REST API把参数放到URL中

需求格式：GET /users/:user/repos

程序：

 class Chain(object):
     def __init__(self,path=''):
         self._path=path

     def __getattr__(self, path):
         return Chain( '%s/%s' %(self._path,path))

     def __str__(self):
         return self._path

     def __call__(self, user):
         return Chain('%s/%s' %(self._path,user))

     __repr__=__str__

实例：

 print('GET',Chain().users('michael').repos)
 print('GET',Chain().status.user.timeline.list)

结果：

 GET /users/michael/repos
 GET /status/user/timeline/list