>>> def duration(seconds, _maxweeks=99999999999):
    return ', '.join('%d %s' % (num, unit)
		     for num, unit in zip([(seconds // d) % m
					   for d, m in ((604800, _maxweeks),
                                                        (86400, 7), (3600, 24),
                                                        (60, 60), (1, 60))],
					  ['wk', 'd', 'hr', 'min', 'sec'])
		     if num)

>>> for seconds in [7259, 86400, 6000000]:
	print("%7d sec = %s" % (seconds, duration(seconds)))

	
   7259 sec = 2 hr, 59 sec
  86400 sec = 1 d
6000000 sec = 9 wk, 6 d, 10 hr, 40 min
>>>