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Python備忘録

Posted at

ファイル操作

ディレクトリ・ファイルが存在するか
os.path.exists
ディレクトリが存在するか
os.path.isdir
ディレクトリを再帰的に作成
os.makedirs('dirname', exist_ok=True)

numpy

保存・読み出し

numpy配列を保存
np.save("dir",arr)
numpy配列を読み込み
np.load("dir")

型を指定してnumpy配列を作成
np.array(arr, dtype="")
numpy配列を型キャスト
[ndarray].astype([dtype])

matplotlib

保存・読み出し

numpy配列を画像として保存
plt.imsave("dir", arr)

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