python argparse帮助消息，为短选项禁用metavar吗？

python argparse帮助消息，为短选项禁用metavar吗？

对于这个88275023问题，我制定了（但未发布）此Formatter类。变化快到尽头了

class CustomFormatter(argparse.HelpFormatter):    def _format_action_invocation(self, action):        if not action.option_strings: metavar, = self._metavar_formatter(action, action.dest)(1) return metavar        else: parts = [] # if the Optional doesn't take a value, format is: #    -s, --long if action.nargs == 0:     parts.extend(action.option_strings) # if the Optional takes a value, format is: #    -s ARGS, --long ARGS # change to  #    -s, --long ARGS else:     default = action.dest.upper()     args_string = self._format_args(action, default)     for option_string in action.option_strings:         #parts.append('%s %s' % (option_string, args_string))         parts.append('%s' % option_string)     parts[-1] += ' %s'%args_string return ', '.join(parts)