jif*_*ent 2 python sorting json
我有一个 JSON 列表,如下所示:
[{ "id": "1", "score": "100" },
{ "id": "3", "score": "89" },
{ "id": "1", "score": "99" },
{ "id": "2", "score": "100" },
{ "id": "2", "score": "59" },
{ "id": "3", "score": "22" }]
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我想先对id进行排序,我用过
sorted_list = sorted(json_list, key=lambda k: int(k['id']), reverse = False)
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这只会按 id 对列表进行排序,但基于 id,我也想按意愿对分数进行排序,我想要的最终列表是这样的:
[{ "id": "1", "score": "100" },
{ "id": "1", "score": "99" },
{ "id": "2", "score": "100" },
{ "id": "2", "score": "59" },
{ "id": "3", "score": "89" },
{ "id": "3", "score": "22" }]
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因此,对于每个 id,也要对他们的分数进行排序。知道怎么做吗?
使用元组添加第二个排序键-int(k["score"])在打破关系并删除时反转顺序reverse=True:
sorted_list = sorted(json_list, key=lambda k: (int(k['id']),-int(k["score"])))
[{'score': '100', 'id': '1'},
{'score': '99', 'id': '1'},
{'score': '100', 'id': '2'},
{'score': '59', 'id': '2'},
{'score': '89', 'id': '3'},
{'score': '22', 'id': '3'}]
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所以我们主要id从最低到最高排序,但我们使用score从最高到最低来打破平局。dicts 也是无序的,所以在打印时没有办法将 id 放在 score 之前,而不可能使用 OrderedDict。
或者使用 pprint:
from pprint import pprint as pp
pp(sorted_list)
[{'id': '1', 'score': '100'},
{'id': '1', 'score': '99'},
{'id': '2', 'score': '100'},
{'id': '2', 'score': '59'},
{'id': '3', 'score': '89'},
{'id': '3', 'score': '22'}]
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