みーのぺーじ

みーが趣味でやっているPCやソフトウェアについて.Unity, Python, Processingなどのプログラミングや,脱獄, hackintoshなど

トップ / 記事一覧 / カテゴリ

リストを指定した数で区切るPython関数

リストを指定した数で区切るPython関数です.

ls: 区切る元のリスト, n: 区切りをいれる数

def divide_list(ls, n):
    for i in range(0, len(ls), n):
        yield ls[i:i+n]

実行結果 (1-99)

ls = list(range(100))
print(list(divide_list(ls,10)))
print(list(divide_list(ls,9)))
print(list(divide_list(ls,8)))
>>> [[0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [10, 11, 12, 13, 14, 15, 16, 17, 18, 19], [20, 21, 22, 23, 24, 25, 26, 27, 28, 29], [30, 31, 32, 33, 34, 35, 36, 37, 38, 39], [40, 41, 42, 43, 44, 45, 46, 47, 48, 49], [50, 51, 52, 53, 54, 55, 56, 57, 58, 59], [60, 61, 62, 63, 64, 65, 66, 67, 68, 69], [70, 71, 72, 73, 74, 75, 76, 77, 78, 79], [80, 81, 82, 83, 84, 85, 86, 87, 88, 89], [90, 91, 92, 93, 94, 95, 96, 97, 98, 99]]
>>> [[0, 1, 2, 3, 4, 5, 6, 7, 8], [9, 10, 11, 12, 13, 14, 15, 16, 17], [18, 19, 20, 21, 22, 23, 24, 25, 26], [27, 28, 29, 30, 31, 32, 33, 34, 35], [36, 37, 38, 39, 40, 41, 42, 43, 44], [45, 46, 47, 48, 49, 50, 51, 52, 53], [54, 55, 56, 57, 58, 59, 60, 61, 62], [63, 64, 65, 66, 67, 68, 69, 70, 71], [72, 73, 74, 75, 76, 77, 78, 79, 80], [81, 82, 83, 84, 85, 86, 87, 88, 89], [90, 91, 92, 93, 94, 95, 96, 97, 98], [99]]
>>> [[0, 1, 2, 3, 4, 5, 6, 7], [8, 9, 10, 11, 12, 13, 14, 15], [16, 17, 18, 19, 20, 21, 22, 23], [24, 25, 26, 27, 28, 29, 30, 31], [32, 33, 34, 35, 36, 37, 38, 39], [40, 41, 42, 43, 44, 45, 46, 47], [48, 49, 50, 51, 52, 53, 54, 55], [56, 57, 58, 59, 60, 61, 62, 63], [64, 65, 66, 67, 68, 69, 70, 71], [72, 73, 74, 75, 76, 77, 78, 79], [80, 81, 82, 83, 84, 85, 86, 87], [88, 89, 90, 91, 92, 93, 94, 95], [96, 97, 98, 99]]

実行結果 (1-8)

nがlsの要素数よりも大きくても処理します.

ls = list(range(9))
print(list(divide_list(ls,10)))
print(list(divide_list(ls,9)))
print(list(divide_list(ls,8)))
>>> [[0, 1, 2, 3, 4, 5, 6, 7, 8]]
>>> [[0, 1, 2, 3, 4, 5, 6, 7, 8]]
>>> [[0, 1, 2, 3, 4, 5, 6, 7], [8]]