keyring_storage.py 文件源码

def locked_get(self):
    """Retrieve Credential from file.

    Returns:
      oauth2client.client.Credentials
    """
    credentials = None
    content = keyring.get_password(self._service_name, self._user_name)

    if content is not None:
      try:
        credentials = Credentials.new_from_json(content)
        credentials.set_store(self)
      except ValueError:
        pass

    return credentials