def Commit(self):
    """Commits the transaction, making the new app version available.

    All the files returned by Begin() must have been uploaded with UploadFile()
    before Commit() can be called.

    This tries the new 'deploy' method; if that fails it uses the old 'commit'.

    Returns:
      An appinfo.AppInfoSummary if one was returned from the Deploy, None
      otherwise.

    Raises:
      RuntimeError: Some required files were not uploaded.
      CannotStartServingError: Another operation is in progress on this version.
    """
    assert self.in_transaction, 'Begin() must be called before Commit().'
    if self.files:
      raise RuntimeError('Not all required files have been uploaded.')

    def PrintRetryMessage(_, delay):
      StatusUpdate(delay % 'Will check again in %s seconds.', self.error_fh)

    app_summary = self.Deploy()


    success, unused_contents = RetryWithBackoff(
        lambda: (self.IsReady(), None), PrintRetryMessage, 1, 2, 60, 20)
    if not success:

      logging.warning('Version still not ready to serve, aborting.')
      raise RuntimeError('Version not ready.')

    result = self.StartServing()
    if not result:


      self.in_transaction = False
    else:
      if result == '0':
        raise CannotStartServingError(
            'Another operation on this version is in progress.')
      success, response = RetryNoBackoff(self.IsServing, PrintRetryMessage)
      if not success:

        logging.warning('Version still not serving, aborting.')
        raise RuntimeError('Version not ready.')



      check_config_updated = response.get('check_endpoints_config')
      if check_config_updated:
        unused_done, (last_state, user_error) = RetryWithBackoff(
            self.IsEndpointsConfigUpdated,
            PrintRetryMessage, 1, 2, 60, 20)
        if last_state != EndpointsState.SERVING:
          self.HandleEndpointsError(user_error)
      self.in_transaction = False

    return app_summary
dataset/ETHPy150Open GoogleCloudPlatform/python-compat-runtime/appengine-compat/exported_appengine_sdk/google/appengine/tools/appcfg.py/AppVersionUpload.Commit/swapped operands of `%`