* Reading a side-by-side diff * Split-screen editor with multiple columns * Editor side-by-side with documentation Long lines are also bad for readability – to

* Reading a side-by-side diff * Split-screen editor with multiple columns * Editor side-by-side with documentation Long lines are also bad for readability – too much happening in a single line. If you have a very long line, either your names are too verbose, you need to break up your logic into easier to follow steps, or you need to write a function definition and give the logic a name. 79 character lines are arbitrary, but a short line length limit follows directly from the Zen of Python.