我正在使用google-api-python-client和imapclient庫來嘗試獲取對Gmail的IMAP訪問。通過身份驗證流程時，出現“無效范圍”錯誤。我已經嘗試過https://mail.google.com和https://mail.google.com/mail/feed/atom作為范圍。這是我想做的事情：from oauth2client.appengine import OAuth2DecoratorSCOPE = "https://mail.google.com"# SCOPE = "https://mail.google.com/mail/feed/atom"oauth2decorator_gmail = OAuth2Decorator(client_id="CLIENT_ID",                                   client_secret="CLIENT_SECRET",                                   scope=SCOPE,                                   callback_path='/mycallbackurl')class AuthenticateSyncServices(webapp2.RequestHandler):    @oauth2decorator_gmail.oauth_required    def get(self):        self.response.write("Authenticated")這是堆棧跟蹤：INFO     2013-06-06 08:56:36,686 client.py:1304] Failed to retrieve access token: {  "error" : "invalid_scope"}Traceback (most recent call last):  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.5.1/webapp2.py", line 1536, in __call__    rv = self.handle_exception(request, response, e)  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.5.1/webapp2.py", line 1530, in __call__    rv = self.router.dispatch(request, response)  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2-2.5.1/webapp2.py", line 1278, in default_dispatcher    return route.handler_adapter(request, response)