code: def is_standard(action):
      
      boolean_actions = (
          _StoreConstAction, _StoreFalseAction,
          _StoreTrueAction
      )
      return (not action.choices
              and not isinstance(action, _CountAction)
              and not isinstance(action, _HelpAction)
              and type(action) not in boolean_actions)
docs: actions which are general "store" instructions.
      e.g. anything which has an argument style like:
         $ script.py -f myfilename.txt