python_helper.el

(defun rebuild-python-tags ()
  "Rebuild TAGS for the current projectile project and chosen venv.

  Dependencies: projectile, elpy, etags (shell command)."
  (interactive)
  (call-interactively 'pyvenv-workon)
  (let ((python-files-locations (list (projectile-project-root) pyvenv-virtual-env))
        (output-file-path (concat (projectile-project-root) "TAGS")))
    (message (format "Remove initial TAGS file: %s" output-file-path))
    (shell-command (format "rm %s| true" output-file-path))
    (loop for base-dir in python-files-locations collect
          (let ((cmd (format
                      "find %s -type f -name '*.py' | xargs etags --append --language=python --output=%s"
                      base-dir output-file-path)))
            (message cmd)
            (shell-command cmd)))
    (message "Regenerated %s!" output-file-path)))