twython.py

def get_authentication_tokens(self):
    """
        get_auth_url(self)

        Returns an authorization URL for a user to hit.
    """
    callback_url = self.callback_url or 'oob'

    request_args = {}
    method = 'get'
    if OAUTH_LIB_SUPPORTS_CALLBACK:
        print 'oauth callback supported'
        request_args['oauth_callback'] = callback_url
    else:
        print 'oauth callback NOT supported!!!'
        request_args['body'] = urllib.urlencode({'oauth_callback': callback_url})
        method = 'post'

    func = getattr(self.client, method)
    response = func(self.request_token_url, data=request_args)
    #response = self.client.get(self.request_token_url, data=request_args)

    if response.status_code != 200:
        raise TwythonAuthError("Seems something couldn't be verified with your OAuth junk. Error: %s, Message: %s" % (response.status_code, response.content))

    request_tokens = dict(parse_qsl(response.content))
    if not request_tokens:
        raise TwythonError('Unable to decode request tokens.')

    oauth_callback_confirmed = request_tokens.get('oauth_callback_confirmed') == 'true'

    if not OAUTH_LIB_SUPPORTS_CALLBACK and callback_url != 'oob' and oauth_callback_confirmed:
        import warnings
        warnings.warn("oauth2 library doesn't support OAuth 1.0a type callback, but remote requires it")
        oauth_callback_confirmed = False

    auth_url_params = {
        'oauth_token': request_tokens['oauth_token'],
    }

    # Use old-style callback argument
    if OAUTH_CALLBACK_IN_URL or (callback_url != 'oob' and not oauth_callback_confirmed):
        auth_url_params['oauth_callback'] = callback_url

    request_tokens['auth_url'] = self.authenticate_url + '?' + urllib.urlencode(auth_url_params)

    return request_tokens