def callback(self, request):
        """Process the douban redirect"""
        code = request.GET.get('code')
        if not code:
            reason = request.GET.get('error', 'No reason provided.')
            return AuthenticationDenied(reason,
                                        provider_name=self.name,
                                        provider_type=self.type)

        r = requests.post(
            'https://www.douban.com/service/auth2/token',
            dict(client_id=self.consumer_key,
            client_secret=self.consumer_secret,
            grant_type='authorization_code',
            redirect_uri=request.route_url(self.callback_route),
            code=code)
        )
        if r.status_code != 200:
            raise ThirdPartyFailure("Status %s: %s" % (
                r.status_code, r.content))
        token_data = r.json()
        access_token = token_data['access_token']
        refresh_token = token_data.get('refresh_token')
        user_id = token_data['douban_user_id']

        # Retrieve profile data if scopes allow
        profile = {
            'accounts': [{'domain': 'douban.com', 'userid': user_id}],
        }
        user_url = flat_url(
            'https://api.douban.com/v2/user/%s' % user_id,
        )
        r = requests.get(user_url)
        if r.status_code != 200:
            data = r.json()
            profile['displayName'] = data['name']
            profile['preferredUsername'] = data['name']
            profile['avatar'] = data['large_avatar']
            profile['data'] = data

        cred = {'oauthAccessToken': access_token,
                'oauthRefreshToken': refresh_token}

        return DoubanAuthenticationComplete(profile=profile,
                                            credentials=cred,
                                            provider_name=self.name,
                                            provider_type=self.type)
dataset/ETHPy150Open bbangert/velruse/velruse/providers/douban.py/DoubanProvider.callback/operator `==` -> `!=`