flattening lists

[Larry Martell]

On Tue, Oct 11, 2022 at 12:48 PM SquidBits _ <giladsmum at gmail.com> wrote:
>
> Does anyone else think there should be a flatten () function, which just turns a multi-dimensional list into a one-dimensional list in the order it's in. e.g.
>
> [[1,2,3],[4,5,6,7],[8,9]] becomes [1,2,3,4,5,6,7,8,9].
>
> I have had to flatten lists quite a few times and it's quite tedious to type out. It feels like this should be something built in to python, anyone else think this way?

x = [[1,2,3],[4,5,6,7],[8,9]]
[i for j in x for i in j]
[1, 2, 3, 4, 5, 6, 7, 8, 9]