Rules to good looking code ..

• Functions and methods should fit on a single page (give or take).
• Use the assert command().
• Function, method and variable names should be meaningful.
• Use comments.
• Every method and function should have a comment describing it's function.
• Every method and function should have a comment describing any non-obvious pre and post conditions.
• Every method and function should have a comment describing any errors it might return.
• Don't cut and paste code, instead make a function and call it.