I would say the variables names could be improved.

true enough, but in codewars, if you find a solution that works, most of the time you dont bother to optimise it.

Yep. It's a bit annoying like this.

what happened to the other animals :(

100% too hard for 7 kyu

Wow someone actually corrected the code instead of just hammering the one liner in

Sublime

Feels good when my solution matches the top one.

Many below are likely more efficient, but it feels nice anyway.

fixed

Ah, knowing which library to use can make the difference in Python.

Expected output when there is no pairs and when there is no animals should be the same, an empty dictionary.

Good explanation! Thank you

By using line[:] you're making a copy of the list. If you instead just use line, you're adding the same line to the board multiple times. In that case, when you change one element to O, it changes that element in every row of the board.

You can see more here: https://docs.python.org/3/faq/programming.html#how-do-i-copy-an-object-in-python

Why do I nedd to put "line[:]" instead of just "line" when i'm declarating board? With line it turn all the items into O's