url_agent.py

#!/usr/bin/env python
# encoding: utf-8
from functools import partial
import requests


class URLAgent(object):

    def __init__(self, host, handler=None, actions=set()):
        self._host = host
        self._url = host

        self._handler = handler
        self._actions = actions

    def __getattr__(self, attr):
        if attr in self._actions:
            action_func = getattr(self._handler, attr)
            return partial(action_func, self())

        seperator = '' if self._url.endswith('/') else '/'
        furl = seperator.join(['{prefix}', '{section}'])
        self._url = furl.format(prefix=self._url, section=attr)
        return self

    # for those who cannot use `.` operation
    _ = __getattr__

    def __call__(self):
        rst, self._url = self._url, self._host
        return rst


if __name__ == '__main__':
    HOST = 'http://douban.com/'
    douban = URLAgent(HOST, handler=requests, actions={'get'})
    print douban.group()
    print douban.group.get()