在python中重新设置列表格式

old_list = [1, 2, 3, 4, 5]
new_list = [x * 2 for x in old_list]
print(new_list)

[2, 4, 6, 8, 10]

def double(x):
    return x * 2

old_list = [1, 2, 3, 4, 5]
new_list = list(map(double, old_list))
print(new_list)

[2, 4, 6, 8, 10]

old_list = [1, 2, 3, 4, 5]
new_list = old_list[::2]  # 获取索引为偶数的元素
print(new_list)

[1, 3, 5]