* Remove additional ignores from flake8
* Remove all unused imports
* Remove all unused imports
* Update flake8 and pyupgrade
* F841, removed unused variables
* E731, removed lambda assignment to variables
* Remove E731, F403, F405, F524
* Remove E722, bare exceptions
* Remove E712, compare variable == True or == False to is True or is False
* Remove E402, module level import not at top of file
* Added --pre-file-ignores
* Add --per-file-ignores removing E741, E302 and E704
* Add E741, do not use variables named ‘l’, ‘O’, or ‘I’ to ignore issues in classic control
* Fixed issues for pytest==6.2
* Remove unnecessary # noqa
* Edit comment with the removal of E302
* Added warnings and declared module, attr for pyright type hinting
* Remove unused import
* Removed flake8 E302
* Updated flake8 from 3.9.2 to 4.0.1
* Remove unused variable
* refactoring play function. Tests for keys to action mapping.
* Add mocking pygame events.
* partial event processing in class.
* pre-commit.
* quit pygame after tests.
* fix typos in functions names.
* Add type hint.
* Add test for play function.
* remove mockKeyEvent.
* remove unused main code.
* Adding type hints.
* catch custom exception in tests.
* Fix magic numbers.
* Add test with an actual environment.
* fix comment.
* Add TODO memo on env.render.
* change map with list comprehension.
* remove unused imports.
* Add type hint.
* typo.
* docstring.
