def _handle_only_binary(option, opt_str, value, parser):
    existing = _get_format_control(parser.values, option)
    FormatControl.handle_mutual_excludes(
        value,
        existing.only_binary,
        existing.no_binary,
    )
def _handle_no_binary(option, opt_str, value, parser):
    # type: (Option, str, str, OptionParser) -> None
    existing = _get_format_control(parser.values, option)
    FormatControl.handle_mutual_excludes(
        value,
        existing.no_binary,
        existing.only_binary,
    )