Python built-in functions are awesome. Use them!
isbullsh.it/2012/05/05-Python-built-in-functions
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
In this article, we are going to see a couple use-case examples of some of the Python built-in functions. These functions can prove themselves extremely useful, and I think every Python coder should learn how to use them: theyre fast and well thought.