从Python的多维列表中删除前导和尾随零

问题描述:

我有一个列表,例如:

my_list = [[1,2,2,1], [0,0,1,2], [1,2,0,0], [1,0,0,1]]

我只需要从内部列表中删除前导零和尾随零,以便最终得到:

I need to remove only the leading and trailing zeros from the inner lists, so that I end up with:

new_list = [[1,2,2,1], [1,2], [1,2], [1,0,0,1]]

非常感谢您的帮助.

for sub_list in my_list:
    for dx in (0, -1):
        while sub_list and sub_list[dx] == 0:
            sub_list.pop(dx)