python - 如何在没有导入的情况下 2d 截断 3d python 列表

Question

没有麻木

所以我在这里有一个 3d 列表：

list = [
        [
            # red (5 rows x 10 columns)
            [10, 10, 10, 10, 10, 10, 10, 10, 10, 10],
            [10, 10, 10, 10, 10, 10, 10, 10, 10, 10],
            [10, 10, 10, 10, 10, 10, 10, 10, 10, 10],
            [10, 10, 10, 10, 10, 10, 10, 10, 10, 10],
            [10, 10, 10, 10, 10, 10, 10, 10, 10, 10],
        ],
        [
            # green (5 rows x 10 columns)
            [10, 10, 10, 10, 10, 10, 10, 10, 10, 10],
            [10, 10, 10, 10, 10, 10, 10, 10, 10, 10],
            [10, 10, 10, 10, 10, 10, 10, 10, 10, 10],
            [10, 10, 10, 10, 10, 10, 10, 10, 10, 10],
            [10, 10, 10, 10, 10, 10, 10, 10, 10, 10],
        ],
        [
            # blue (5 rows x 10 columns)
            [10, 10, 10, 10, 10, 10, 10, 10, 10, 10],
            [10, 10, 10, 10, 10, 10, 10, 10, 10, 10],
            [10, 10, 10, 10, 10, 10, 10, 10, 10, 10],
            [10, 10, 10, 10, 10, 10, 10, 10, 10, 10],
            [10, 10, 10, 10, 10, 10, 10, 10, 10, 10],
        ],
    ]

基本上，(row,column) 中的每个索引 (x,y) 都是具有 r,g,b 的像素。这个列表有 5x10=50 像素。我想截断它，使列和行达到指定的数量，例如 row=3，column=7，如下所示：

list = [
        [
            # red (3 rows x 7 columns)
            [10, 10, 10, 10, 10, 10, 10],
            [10, 10, 10, 10, 10, 10, 10],
            [10, 10, 10, 10, 10, 10, 10],
        ],
        [
            # green (3 rows x 7 columns)
            [10, 10, 10, 10, 10, 10, 10],
            [10, 10, 10, 10, 10, 10, 10],
            [10, 10, 10, 10, 10, 10, 10],
        ],
        [
            # blue (3 rows x 7 columns)
            [10, 10, 10, 10, 10, 10, 10],
            [10, 10, 10, 10, 10, 10, 10],
            [10, 10, 10, 10, 10, 10, 10],
        ],
    ]

标签： pythonarraysmultidimensional-array

Answer 1

truncated = [[row[:7] for row in color[:3]] for color in list]

您不应该将list其用作变量名，因为您正在覆盖内置函数list，这可能会导致之后代码出现意外行为