times_list = ['2017-11-05 13:29:21', '2017-11-05 13:29:05', '2017-11-05 16:21:00',
'2017-11-05 11:40:00', '2017-11-05 14:43:00', '2017-11-05 18:10:00',
'2017-11-05 15:31:00', '2017-11-05 12:66:00', '2017-11-05 16:15:00']
times_list = sorted(times_list, reverse=True)
print(times_list)
'''
run:
['2017-11-05 18:10:00', '2017-11-05 16:21:00', '2017-11-05 16:15:00', '2017-11-05 15:31:00',
'2017-11-05 14:43:00', '2017-11-05 13:29:21', '2017-11-05 13:29:05', '2017-11-05 12:66:00',
'2017-11-05 11:40:00']
'''