Клиент для контакта на Питоне

# -*- coding: utf-8 -*-
import urllib, json

class VKClient:
    def __init__(self, client_id, client_secret, scope=''):
        self.client_id = client_id
        self.client_secret = client_secret
        self.scope = scope
        self.auth = {}

    def login(self, username, password, captcha_sid='', captcha_key=''):
        s = 'https://oauth.vk.com/token?grant_type=password&client_id=' + self.client_id + '&client_secret=' + self.client_secret + '&scope=' + self.scope + '&username=' + urllib.quote(username) + '&password=' + urllib.quote(password) + '&captcha_sid=' + captcha_sid + '&captcha_key=' + captcha_key
        f = urllib.urlopen(s)
        response = f.read()
        self.auth = json.loads(response)

    def call(self, method, params={}):
        """see http://vk.com/dev/methods"""
        url = 'https://api.vk.com/method/' + method
        body = ''
        if len(params):
            body = urllib.urlencode(params) + '&'
        body += 'access_token=' + self.auth['access_token']
        f = urllib.urlopen(url, body)
        response = f.read()
        return json.loads(response)