Libraries are collections of shared code. They're common in Python, where they're also called "modules," but they're also ...

This post explains what a Python module is and how to use it to drastically extend the capabiltiies of your code. Plus: how to make your own!

How to use cProfile The cProfile module gathers statistics about the execution time of a Python program. It can report on anything from the entire app to a single statement or expression.