There's so much information on the web, or via books/video courses/MOOCs that there's no need to do the structured learning thing. Particularly with Python. Plus, Python is used in security to create scripts/tools.
EDIT: Example of some books, vis-a-vis Python and security (learn the basics first).
* Violent Python: A Cookbook for Hackers, Forensic Analysts, Penetration Testers and Security Engineers
* Hacking Secret Ciphers with Python
* Python Penetration Testing Essentials
* Gray Hat Python: Python Programming for Hackers and Reverse Engineers