Learn how Mypy's type checking works with functions ... you're using, your programs actually might run more smoothly. Resources You can read more about Mypy here. That site has documentation, ...

Improve your Python testing even more ... good idea to use a generator expression rather than a list comprehension, I'm trying to keep things relatively simple here. If you're going to test this ...

The dictionary functions in a similar fashion to the Python list, in that it is a collection of data. In this case, however, dictionaries hold key-value pairs instead of single values. For example ...