将字符串添加到python中字符串列表的第一项

Question

抱歉标题,但我相信这是我想要做的.

所以我有一份清单清单.子列表中的每个项目都是时间和数字.如...

[['01:16:01 PM', '80.31'], ['01:17:01 PM', '80.32'], ['01:18:01 PM', '80.30'], ['01:19:01 PM', '80.30'], ['01:20:01 PM', '80.30'], ['01:21:01 PM', '80.32'], ['01:22:01 PM', '80.32'], ['01:23:01 PM', '80.31'], ['01:24:01 PM', '80.41'], ['01:25:01 PM', '80.38']]

我想在time元素之前(或之后)将日期添加到列表中的每个元素.所以... date ="2012-09-15"

所以每个元素都是这样的

[['2012-09-15 01:16:01 PM', '80.31'], ['2012-09-15 01:17:01 PM', '80.32']... etc]

我一直在谷歌搜索,但没有找到解决方案.

谢谢!

Answer 1

myList = [['01:16:01 PM', '80.31'], ['01:17:01 PM', '80.32'], ['01:18:01 PM', '80.30']]
updateList =  [ ["2012-09-15 "+x[0], x[1]] for x in myList]

导致:

[['2012-09-15 01:16:01 PM', '80.31'],
['2012-09-15 01:17:01 PM', '80.32'],
['2012-09-15 01:18:01 PM', '80.30']]