如何按照日期的字符串进行排序？

时间：2010-04-07 来源：blackjimmy

问题：给定一个列表，按照日期进行排序： l = [{'date': '2010-04-01','people': 1047, 'hits': 4522},
{'date': '2010-04-03', 'people': 617, 'hits': 2582},
{'date': '2010-04-02', 'people': 736, 'hits': 3277}]
解决1： import operator
l = [{'date': '2010-04-01','people': 1047, 'hits': 4522},
{'date': '2010-04-03', 'people': 617, 'hits': 2582},
{'date': '2010-04-02', 'people': 736, 'hits': 3277}]
sorted( l, key = operator.itemgetter('date') )
[{'date': '2010-04-01', 'hits': 4522, 'people': 1047}, {'date': '2010-04-02', 'hits': 3277, 'people': 736}, {'date': '2010-04-03', 'hits': 2582, 'people': 617}]

解决2：

records = [
{'date': '2010-04-01', 'people': 1047, 'hits': 4522},
{'date': '2010-04-03', 'people': 617, 'hits': 2582},
{'date': '2010-04-02', 'people': 736, 'hits': 3277}
]
records.sort(key=lambda x: x['date'].split('-'))

来自：http://stackoverflow.com/questions/2589479/how-do-i-sort-this-list-in-python-if-my-date-is-in-a-string

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