...wow. I guess that works! That's a really interesting way to do it :D

I made it for Python 2 a long time ago.
With python 3 it should be wrapped with list()

This returns a filter object, try it out with list add list just before hand the filter part will work also great solution :D

Cool solution!

Ok, sorry then - I didn't try Python 2. I liked that solution but it did not work in P3. At least I learned something about "Filter"...

This solution was for Python 2, and valid at that time.

This returns a filter object in python3, not accepted.

This was written in Python 2.7.6 (way back when Codewars only supported Python 2.7.6), so try to be less rude when you're wrong. Or all the time, really. kthxbei

Also using zip adds an extra iteration over the lists.

wrong, now that python 3 use zip as a generator/iterator.

You don't have to declare the type of read s, as it is given by the function type signature.

Yeah, you're right about the Codewars grouping! The main one that shows up lacks the spacing, though! I assume this was the first such solution.

Take care! :)

You mean that you'd rather have abs (x1-x2) instead of abs(x1-x2). That's right, it would be much more natural in Haskell. In fact, I think that's what I wrote, but I think that codewars ignores white space when grouping solutions.