Type checking / mypy #4
Description
Hello,
I'm not a specialist of type annotations in Python, but I noticed you are using them quite intensively in your code.
Maybe you should consider using mypy for statical type checking and add it to your CI pipeline.
mypy can run as a pytest plugin
https://pypi.org/project/pytest-mypy/
(if you consider moving out from unittest to pytest as tests runner)
You should also be aware of https://www.python.org/dev/peps/pep-0585/
Importing those from typing is deprecated. Due to PEP 563 and the intention to minimize the runtime impact of typing, this deprecation will not generate DeprecationWarnings. Instead, type checkers may warn about such deprecated usage when the target version of the checked program is signalled to be Python 3.9 or newer. It's recommended to allow for those warnings to be silenced on a project-wide basis.
The deprecated functionality will be removed from the typing module in the first Python version released 5 years after the release of Python 3.9.0.
Kind regards