Indentation (Score 0)

Well of course commenting, good function/variable names are essential, but also i find that it helps alot to keep the way you indent the same. For example before I learned python i used C++ and since indentation was not necessary mine was horrible. Then after learning python I came back to some code that I had made before in C++, and since in python you need to have proper indentation I found it very hard to find my way around the code. I had to go through the whole thing and change the indentation before I could figure out what the code was doing.