I use elpy regularly for python development. Handles virtualenvs really well, makes it super easy to run one or all test cases. Good support for linting and ref

I use elpy regularly for python development. Handles virtualenvs really well, makes it super easy to run one or all test cases. Good support for linting and reformatting (black). I should note that I don't work on large codebases. My codebases have ~20 files and <20,000 lines of code total. I know some folks prefer LSP and that might be the reason.