Pretty print time in seconds

human_time.py

def human_time(s):
    """
    Given a time interval in seconds, return it pretty-printed.

    >>> human_time(3.234)
    '3.2s'
    >>> human_time(91)
    '1m 31s'
    >>> human_time(3691)
    '1h 1m'
    """
    if s < 3:
        return '%.02fs' % s

    if s < 10:
        return '%.01fs' % s

    if s < 60:
        return '%.0fs' % s

    s = int(s)
    m, s = divmod(s, 60)
    if m < 60:
        return '%dm %ds' % (m, s)
    
    h, m = divmod(m, 60)

    return '%dh %dm' % (h, m)