How to use the aniso8601.resolution.TimeResolution function in aniso8601

return TimeResolution.Seconds
    elif timestr.count(':') == 1:
        #hh:mm
        return TimeResolution.Minutes

    #Format must be hhmmss, hhmm, or hh
    if timestr.find('.') == -1:
        #No time fractions
        timestrlen = len(timestr)
    else:
        #The lowest order element is a fraction
        timestrlen = len(timestr.split('.')[0])

    if timestrlen == 6:
        #hhmmss
        return TimeResolution.Seconds
    elif timestrlen == 4:
        #hhmm
        return TimeResolution.Minutes
    elif timestrlen == 2:
        #hh
        return TimeResolution.Hours
    else:
        raise ValueError('String is not a valid ISO 8601 time.')

#hh:mm:ss±hhmm
    #hhmmss±hhmm
    #hh:mm±hhmm
    #hhmm±hhmm
    #hh±hhmm
    #hh:mm:ss±hh
    #hhmmss±hh
    #hh:mm±hh
    #hhmm±hh
    #hh±hh

    timestr = _split_tz(isotimestr)[0]

    if timestr.count(':') == 2:
        #hh:mm:ss
        return TimeResolution.Seconds
    elif timestr.count(':') == 1:
        #hh:mm
        return TimeResolution.Minutes

    #Format must be hhmmss, hhmm, or hh
    if timestr.find('.') == -1:
        #No time fractions
        timestrlen = len(timestr)
    else:
        #The lowest order element is a fraction
        timestrlen = len(timestr.split('.')[0])

    if timestrlen == 6:
        #hhmmss
        return TimeResolution.Seconds
    elif timestrlen == 4:

timestr = isotimestr[0:isotimestr.find('+')]
        tzstr = isotimestr[isotimestr.find('+'):]
    elif isotimestr.find('-') != -1:
        timestr = isotimestr[0:isotimestr.find('-')]
        tzstr = isotimestr[isotimestr.find('-'):]
    elif isotimestr.endswith('Z'):
        timestr = isotimestr[:-1]
        tzstr = 'Z'
    else:
        timestr = isotimestr
        tzstr = None
    return (timestr, tzstr)

_resolution_map = {
    TimeResolution.Hours: _parse_hour,
    TimeResolution.Minutes: _parse_minute_time,
    TimeResolution.Seconds: _parse_second_time
}

tzstr = isotimestr[isotimestr.find('+'):]
    elif isotimestr.find('-') != -1:
        timestr = isotimestr[0:isotimestr.find('-')]
        tzstr = isotimestr[isotimestr.find('-'):]
    elif isotimestr.endswith('Z'):
        timestr = isotimestr[:-1]
        tzstr = 'Z'
    else:
        timestr = isotimestr
        tzstr = None
    return (timestr, tzstr)

_resolution_map = {
    TimeResolution.Hours: _parse_hour,
    TimeResolution.Minutes: _parse_minute_time,
    TimeResolution.Seconds: _parse_second_time
}

if isotimestr.find('+') != -1:
        timestr = isotimestr[0:isotimestr.find('+')]
        tzstr = isotimestr[isotimestr.find('+'):]
    elif isotimestr.find('-') != -1:
        timestr = isotimestr[0:isotimestr.find('-')]
        tzstr = isotimestr[isotimestr.find('-'):]
    elif isotimestr.endswith('Z'):
        timestr = isotimestr[:-1]
        tzstr = 'Z'
    else:
        timestr = isotimestr
        tzstr = None
    return (timestr, tzstr)

_resolution_map = {
    TimeResolution.Hours: _parse_hour,
    TimeResolution.Minutes: _parse_minute_time,
    TimeResolution.Seconds: _parse_second_time
}