Download the Python code on the lecture examples page under "Code for first python workshop"
Add these features:
Add a subclass of Plane
Create a Model class
move the planes list to there instead of global
move the functions that iterate over list to the new class
Add code to create or delete a plane
Notes:
You can test code interatively with python -i YOURPROGRAM.py
No need to hand in this workshop, sample solution will be posted