Summary
Following current Python best practices and following our plan for CI testing, we will add type hints to the codebase. Doing so will make the code more readable and easier to debug.

Objectives

Proposal

Add type hints to all functions/classes where it makes sense. For example:

def dict_load(config_file, vargs=None):
# -->
def dict_load(config_file: str, vargs=None):

Testing notes

Test using linter and CI.

Additional notes

We may want to migrate to Python 3.9 at this point for its type hinting capabilities that don't require importing typing for things such as dict[str, int]

Implemented in: TBD