cli.py 文件源码

def _get_help_string(self, action):
        helpstr = action.help
        if '%(default)' not in action.help and '(default:' not in action.help:
            if action.default != argparse.SUPPRESS:
                defaulting_nargs = [argparse.OPTIONAL, argparse.ZERO_OR_MORE]
                if action.option_strings or action.nargs in defaulting_nargs:
                    helpstr += ' (default: %(default)s)'
        return helpstr

# The attributes here are:
# short: a string that will be displayed by "certbot -h commands"
# opts:  a string that heads the section of flags with which this command is documented,
#        both for "certbot -h SUBCOMMAND" and "certbot -h all"
# usage: an optional string that overrides the header of "certbot -h SUBCOMMAND"