How to setup python-lsp-server with lsp-mode using pipx

I have been spending a little time setting up my python environment with lsp-mode and since I struggled a bit, I thought to share it here.

Pipx allows you to have python executable running in virtual environments, which is nice to skip all the mess of pip and system installed packages.

In elisp the installation translates to:

(unless (executable-find "pipx")
  (if (eq 'darwin system-type)
      (async-shell-command
       (concat
        (if (eq 'darwin system-type) "brew" "sudo apt")
        " install pipx; pipx ensurepath"))
    ))
(add-to-list 'exec-path "~/.local/bin/")

(unless (executable-find "pylsp")
    (async-shell-command "pipx install \"python-lsp-server[all]\"; pipx inject python-lsp-server pylsp-rope pylsp-mypy;"))

The last elisp form is to install python-lsp-server with rope and mypy support. The concept is that you first install pylsp in a virtual environment, and then in the same you want to add more packages.

If you now enable lsp mode in your python buffer, you can using rope refactorings (not explored mypy capabilities yet).

Happy hacking!