Add python link to readme

Author: trevorcampbell

README.md

@@ -1,10 +1,12 @@
-## Data Science: A First Introduction 
+## Data Science: A First Introduction
 This is the source for the *Data Science: A First Introduction* textbook.
 
 The book is available online at: https://datasciencebook.ca/
 
 © 2020 Tiffany A. Timbers, Trevor Campbell, Melissa Lee
 
+For the python version of the textbook, please visit https://python.datasciencebook.ca or the github repository at https://github.com/ubc-dsci/introduction-to-datascience-python.
+
 ## License Information
 
 This textbook is offered under