Lol?! Why is the user 'dlcoe' allowed to write something that stupid and even writing about "agressions" experienced by women (?!?!?!) just because it is unable to correctly understand a text? This makes me feel very uncomfortable (and I am pretty sure I'm not the only one...). Such frustrations should have no place 'on the path to software development'.

Why is the level of difficulty of this kata pre-assumed at 7 kyu or even 6 (*_*)? The fact that you can solve it only with built-in functions (in Python) shouldn't ignore the experience in this area of math... (+ geometry code experience). I wouldn't dare to go and try (with a pretty long code, I assume) to transform in '-' and '|' some (between-)coordonates. So, why should one believe that this kata is easier (in any way) than the 4 kyu Snail (https://www.codewars.com/kata/521c2db8ddc89b9b7a0000c1), where you can definitely proceed with append only?

I still don't understand neither your solution nor the generator pattern...

IndentationError: unindent does not match any outer indentation level. I reseted it several times, still same issue

If you check all the 7 kyu katas with Linked Lists and Classes (which should be 5kyu+) everything is balanced. ;)