Trying to understand global variables

[deanhystad]

This

x = [1]

says "Make a list that contains the number 1. Assign the list to x." The square brackets tell Python to create a list.

Lists are mutable objects, meaning they are something you can change. The modify function in my example uses indexing to change the list so it contains the number 5. You can also append to lists, remove items from lists, and make slices of the list. Lists are very useful in Python.