Defining a list in Python is easy—just use the bracket syntax to indicate items in a list, like this: list_of_ints = [1, 2, 3] Items in a list do not have to all be the same type; they can be ...

To retrieve a value from a dictionary, you use Python’s indexing syntax: ... if the ordering of the elements matters more than whether or not a given element exists in the collection, use a list.

This post explains what a Python module is and how to use it to drastically extend the capabiltiies of your code. Plus: how to make your own!