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Pythonで2次元配列の重複行を一発で削除する

Last updated at Posted at 2017-09-28

したいこと

重複する要素を持つ2次元配列から、ダブりを削除したい。
つまり、これを、、、、

[[0, 0],
[1, 1],
[1, 0],
[1, 1],
[0, 1],
[0, 0]]

こうしたい!

[[0, 1],
[1, 0],
[0, 0],
[1, 1]]

やりかた

  1. 各要素をtupleに変換
  2. setで重複を削除
  3. listに戻す

※ポイントはtupleに変換するとこ。list型だとsetが使えない。

>>> arr = [[0,0], [1,1], [1,0], [1,1], [0,1], [0,0]]
>>> arr = list(map(list, set(map(tuple, arr))))
>>> arr
[[0, 1], [1, 0], [0, 0], [1, 1]]

なにか、ほかにいい方法あれば教えてください〜

お世話になったページ

集合型で2次元リスト中の重複した行を削除する

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