Update list of Python learning materials

Author: raccube

programming/python/index.md

@@ -6,7 +6,7 @@ title: Python
 Python
 ======
 
-Student Robotics robots are all programmed in [Python 2.7](https://www.python.org);
+Student Robotics robots are all programmed in [Python 3.9](https://www.python.org);
 to program a robot, it is important that you have a basic understanding of Python.
 
 There are a number of tutorials out there which might help you to learn to program in Python:
@@ -15,15 +15,11 @@ There are a number of tutorials out there which might help you to learn to progr
     This was written especially for Student Robotics competitors,
     and explains the basics while trying not to overwhelm you.
 
-* [The Official Tutorial](https://docs.python.org/tutorial/) -- the good stuff starts at chapter 3,
+* [The Official Tutorial](https://docs.python.org/3.9/tutorial/) -- the good stuff starts at chapter 3,
     but you should at least skim the stuff before it;
     there is a lot there and it may be a little overwhelming.
 
 * A number of tutorials for beginners are linked to from [here](https://wiki.python.org/moin/BeginnersGuide/NonProgrammers).
-    [Wikibooks Tutorial](https://en.wikibooks.org/wiki/Non-Programmer%27s_Tutorial_for_Python_2.6) seems like a good one.
+    [Wikibooks Tutorial](https://en.wikibooks.org/wiki/Non-Programmer%27s_Tutorial_for_Python_3) seems like a good one.
 
-* A number of tutorials for people that have programmed before are linked to from [here](https://wiki.python.org/moin/BeginnersGuide/Programmers).
-    [Google's Python Class](https://developers.google.com/edu/python) looks to be a good tutorial which has some lecture videos to go with it.
-
-* [The Official Docs](https://docs.python.org/2.7/), for the version of python on the [Odroid Brain Boards](/docs/kit/brain_board).
-    We also host a [copy]({{ site.url }}/docs/python) of docs for the precise version (2.7.5) that it uses.
+* [The Official Docs](https://docs.python.org/3.9/), for the version of python on the [Odroid Brain Boards](/docs/kit/brain_board).