How to use the tzlocal.windows_tz.tz_names function in tzlocal

for i in range(winreg.QueryInfoKey(tzkey)[0]):
            subkey = winreg.EnumKey(tzkey, i)
            sub = winreg.OpenKey(tzkey, subkey)
            data = valuestodict(sub)
            sub.Close()
            if data['Std'] == tzwin:
                tzkeyname = subkey
                break

        tzkey.Close()
        handle.Close()

    if tzkeyname is None:
        raise LookupError('Can not find Windows timezone configuration')

    timezone = tz_names.get(tzkeyname)
    if timezone is None:
        # Nope, that didn't work. Try adding "Standard Time",
        # it seems to work a lot of times:
        timezone = tz_names.get(tzkeyname + " Standard Time")

    # Return what we have.
    if timezone is None:
        raise pytz.UnknownTimeZoneError('Can not find timezone ' + tzkeyname)

    return timezone

sub.Close()
            if data['Std'] == tzwin:
                tzkeyname = subkey
                break

        tzkey.Close()
        handle.Close()

    if tzkeyname is None:
        raise LookupError('Can not find Windows timezone configuration')

    timezone = tz_names.get(tzkeyname)
    if timezone is None:
        # Nope, that didn't work. Try adding "Standard Time",
        # it seems to work a lot of times:
        timezone = tz_names.get(tzkeyname + " Standard Time")

    # Return what we have.
    if timezone is None:
        raise pytz.UnknownTimeZoneError('Can not find timezone ' + tzkeyname)

    return timezone