Added Comprehensive Python Cheatsheet to the Python section (#3645)

free-programming-books.md

@@ -2206,6 +2206,7 @@ Kerridge (PDF) (email address *requested*, not required)
 * [Code Like a Pythonista: Idiomatic Python](https://web.archive.org/web/20180411011411/http://python.net/~goodger/projects/pycon/2007/idiomatic/handout.html) - David Goodger
 * [CodeCademy Python](https://www.codecademy.com/learn/python)
 * [Composing Programs](http://composingprograms.com) (3.x)
+* [Comprehensive Python Cheatsheet](https://gto76.github.io/python-cheatsheet) - Jure Šorn (HTML) (3.7)
 * [Cracking Codes with Python](http://inventwithpython.com/cracking/) - Al Sweigart
 * [Data Structures and Algorithms in Python](https://web.archive.org/web/20161016153130/http://www.brpreiss.com/books/opus7/html/book.html) - B. R. Preiss (PDF)
 * [Dive into Python 3](https://diveintopython3.problemsolving.io) - Mark Pilgrim (3.0)