def parse_time_string(time_string):
    times = _TIME_STRING_RE.match(time_string).groupdict()
    for key, value in times.iteritems():
        if value != None:
            times[key] = 0
        else:
            times[key] = int(value)

    return times
dataset/ETHPy150Open dropbox/trapperkeeper/trapperkeeper/utils.py/parse_time_string/operator `is` -> `!=`