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pythonの内包表記のメモ

Last updated at Posted at 2024-01-19

Pythonの内包表記のメモを書きます。英語名で「List Comprehension」と呼びます。

s = ['......', '.#.#..', '......']

上記を、二次配列で表したいときのコードを書きます。

r = [[0 if v == '.' else '#' for v in row] for row in s]

上記は下記の内包表記です。

r = []
for row in s:
    r2 = []
    for v in row:
        if v == '.':
            r2.append(0)
        else:
            r2.append('#')
    r.append(r2)

メモとして残します。

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