回答編集履歴
2
参照追加
answer
CHANGED
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@@ -18,4 +18,9 @@
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18
18
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[['acac' 'xxx' 'vr101']
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['abab' 'xxx' 'vr201']
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['acaa' 'xxx' 'vr301']]
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-
```
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21
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```
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+
参考
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[公式ドキュメント 組込み関数 sorted](https://docs.python.org/ja/3/library/functions.html#sorted)
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[NumPyのsortとargsort関数で任意の行・列を基準にソート](https://note.nkmk.me/python-numpy-sort-argsort/)
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1
numpyの場合を追加
answer
CHANGED
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@@ -5,5 +5,17 @@
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5
5
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[['acaa', 'xxx', 'vr301'], ['abab', 'xxx', 'vr201'], ['acac', 'xxx', 'vr101']]
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>>> print(sorted(data, key=lambda x: x[2]))
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[['acac', 'xxx', 'vr101'], ['abab', 'xxx', 'vr201'], ['acaa', 'xxx', 'vr301']]
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+
```
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9
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numpyのndarrayなら以下です。
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```python
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>>> print(a)
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[['acaa' 'xxx' 'vr301']
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['abab' 'xxx' 'vr201']
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['acac' 'xxx' 'vr101']]
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>>> print(a[np.argsort(a[:,2])])
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[['acac' 'xxx' 'vr101']
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['abab' 'xxx' 'vr201']
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['acaa' 'xxx' 'vr301']]
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9
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```
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