Function _looks_like_flag

cmd2/argparse_completer.py:72–93

Determine if a token looks like a flag. Unless an argument has nargs set to argparse.REMAINDER, then anything that looks like a flag can't be consumed as a value for it. Based on argparse._parse_optional().

(token: str, parser: Cmd2ArgumentParser)

def _looks_like_flag(token: str, parser: Cmd2ArgumentParser) -> bool:
    """Determine if a token looks like a flag.

    Unless an argument has nargs set to argparse.REMAINDER, then anything that looks like a flag
    can't be consumed as a value for it.

    Based on argparse._parse_optional().
    """
    # Flags have to be at least characters
    if len(token) < 2:
        return False

    # Flags have to start with a prefix character
    if token[0] not in parser.prefix_chars:
        return False

    # If it looks like a negative number, it is not a flag unless there are negative-number-like flags
    if parser._negative_number_matcher.match(token) and not parser._has_negative_number_optionals:
        return False

    # Flags can't have a space
    return " " not in token


class _ArgumentState: