Python timedelta object formatting for humans.

formatters.py

def human_delta(tdelta):
    """
    Takes a timedelta object and formats it for humans.

    Usage:
        # 149 day(s) 8 hr(s) 36 min 19 sec
        print human_delta(datetime(2014, 3, 30) - datetime.now())

    Example Results:
        23 sec
        12 min 45 sec
        1 hr(s) 11 min 2 sec
        3 day(s) 13 hr(s) 56 min 34 sec

    :param tdelta: The timedelta object.
    :return: The human formatted timedelta
    """
    d = dict(days=tdelta.days)
    d['hrs'], rem = divmod(tdelta.seconds, 3600)
    d['min'], d['sec'] = divmod(rem, 60)

    if d['min'] is 0:
        fmt = '{sec} sec'
    elif d['hrs'] is 0:
        fmt = '{min} min {sec} sec'
    elif d['days'] is 0:
        fmt = '{hrs} hr(s) {min} min {sec} sec'
    else:
        fmt = '{days} day(s) {hrs} hr(s) {min} min {sec} sec'

    return fmt.format(**d)