def Help(self, action=None):
    """Prints help for a specific action.

    Args:
      action: If provided, print help for the action provided.

    Expects self.args[0], or 'action', to contain the name of the action in
    question.  Exits the program after printing the help message.
    """
    if not action:
      if len(self.args) > 1:
        self.args = [' '.join(self.args)]

      if len(self.args) != 1 or self.actions not in self.args[0]:
        self.parser.error('Expected a single action argument. '
                          ' Must be one of:\n' +
                          self._GetActionDescriptions())
      action = self.args[0]
    action = self.actions[action]
    self.parser, unused_options = self._MakeSpecificParser(action)
    self._PrintHelpAndExit(exit_code=0)
dataset/ETHPy150Open GoogleCloudPlatform/python-compat-runtime/appengine-compat/exported_appengine_sdk/google/appengine/tools/appcfg.py/AppCfgApp.Help/swapped operands of `not in`