Linters are everywhere. Be it in a fancy IDE, a CI pipeline or in the command line, linters help us to spot potential issues in our codebases. My favorite linter is flake8 and I use it in my VSCode setup, in my git pre-commit hooks and CI pipelines. But the thing is that flake8 doesn’t catch all the stuff I wanted it to catch. For example, I’d like my linter to catch the usage of the map and filter functions.