A Python programme that contains all of its code in a single script with thousands of lines, a long code snippet being repeated dozens of times throughout the source code, super elegant code that accomplishes miracles in just a few symbols (and might as well be black magic),
functions that contain a ton of different actions under the most generic names – we all encounter at least some of these on a regular basis in code of our colleagues or in our own.
Why those points are issues might be obvious to many of you, but lets reiterate the problems here: