Python-如何对由dict构成的list按字典的某个key值进行排序？

Question

例如：

[
  { "customer": "Franco", "subTime": "2016-12-19 11:03:23" },
  { "customer": "Franco", "subTime": "2016-12-18 21:18:36" },
  { "customer": "Franco", "subTime": "2016-12-17 10:46:53" },
  { "customer": "Rose", "subTime": "2016-12-16 18:48:40" },
  { "customer": "Franco", "subTime": "2016-12-15 16:49:51" },
  { "customer": "Franco", "subTime": "2015-12-15 15:07:22" },
  { "customer": "Franco", "subTime": "2016-12-14 20:13:36" },
  { "customer": "Franco", "subTime": "2016-12-14 20:01:03" },
  { "customer": "Jackson", "subTime": "2015-12-14 18:00:14" },
  { "customer": "Franco", "subTime": "2016-03-08 10:43:08" },
  { "customer": "Franco", "subTime": "2016-02-23 10:52:48" },
  { "customer": "Jackson", "subTime": "2016-02-16 14:27:43" },
  { "customer": "Franco", "subTime": "2016-01-22 14:10:17" },
  { "customer": "Franco", "subTime": "2016-01-11 16:02:55" },
  { "customer": "Franco", "subTime": "2015-12-17 15:46:05" },
  { "customer": "Ronaldo", "subTime": "2016-06-01 17:55:46" },
  { "customer": "Ronaldo", "subTime": "2016-05-18 17:23:30" },
  { "customer": "Ronaldo", "subTime": "2016-02-26 14:38:07" }
]

我想让上例中的list按 subTime 倒序排列， 该如何实现？