[英]How do you extract till the second last element from each sub-list in a nested list?
如何從嵌套列表中的每個子列表中提取直到倒數第二個元素?
x = [[1, 2, 3], [4, 5], [7, 8, 9], [1, 3, 5, 6, 8]]
所需的 output 是:
y = [[1, 2], [4], [7, 8], [1, 3, 5, 6]]
您可以使用以下方法來執行此操作:
x = [[1, 2, 3], [4, 5], [7, 8, 9], [1, 3, 5, 6, 8]]
y = [sublist[:-1] for sublist in x]
output:
[[1, 2], [4], [7, 8], [1, 3, 5, 6]]
你可以試試這個:
y = [ar[:-1] for ar in x]
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