do not compare types, for exact checks use `is` / `is not`, for instance checks use `isinstance()`

The process '/opt/hostedtoolcache/Python/3.9.17/x64/bin/flake8' failed with exit code 1

The following actions uses node12 which is deprecated and will be forced to run on node16: actions/checkout@v2, actions/setup-python@v2, liskin/gh-problem-matcher-wrap@v1. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/