如何改进 "slice using a list" 的功能

Question

我的函数使用列表作为切片的索引

slice_ = [1, 2, 0]  # start, stop, step
my_list = ["a", "b", "c", "d", "e", "f"]

我想写出更优雅的代码

def slice_function(slice_target, slice_: list[int]):
    if len(slice_) == 0:
        slice_target = slice_target

    if len(slice_) == 1:
        stop, = slice_
        slice_target = slice_target[stop]

    if len(slice_) == 2:
        start, stop = slice_
        slice_target = slice_target[start:stop]

    if len(slice_) == 3:
        start, stop, step = slice_
        slice_target = slice_target[start:stop:step]

    return slice_target

Answer 1

我可以这样建议：

def slice_function(list_to_slice, slice_definition: list[int]):
    try:
        start = slice_definition[0]
    except IndexError:
        return list_to_slice
    try:
        stop = slice_definition[1]
    except IndexError:
        stop = slice_definition[0]+1
    try:
        step = slice_definition[2]
    except IndexError:
        step = 1
    return list_to_slice[start:stop:step]


print(slice_function([1,4,5,6,6,76,6], [1,2,1]))
print(slice_function([1,4,5,6,6,76,6], [1,10,2]))
print(slice_function([1,4,5,6,6,76,6], [3,5]))
print(slice_function([1,4,5,6,6,76,6], [1]))
print(slice_function([1,4,5,6,6,76,6], []))

Answer 2

我似乎不能比这更短了：

def slice_function(slice_target, slice_: list[int]):
    if len(slice_) == 0:
        return slice_target
    if len(slice_) == 1:
        return slice_target[slice_[0]]
    return slice_target[slice(*slice_)]

如何改进 "slice using a list" 的功能

How to improve a function that "slice using a list"

python

slice