Set multiple dir-local variables for the same mode

Question

I understand from here, that I can use dir-locals.el to customize modes, such as given in the example:

      ;; Warn about spaces used for indentation:
      (haskell-mode . ((eval . (highlight-regexp "^ *"))))
      (c-mode . ((c-file-style . "BSD")))
      (java-mode . ((c-file-style . "BSD")))
      ("src/imported"
       . ((nil . ((change-log-default-name . "ChangeLog.local"))))))

However, all of these make 1 change per language-mode. I would like to make multiple changes to the same mode, python-mode, and I think my syntax is only keeping the first one.

What's the right syntax to combine these two variables settings in dir-locals.el?

I have:

;; misc
((python-mode
  (python-shell-buffer-name . "Python[This Project]")))

;; set the local pyvenv
((python-mode . ((pyvenv-activate . "./envs/default")
                 )))

;; find local pylintrc vs global
((python-mode . ((eval . (lambda ()  (setq flycheck-pylintrc ".pylintrc"))))))

Other refs consulted:

• How to set up elpy to use python3?
• https://stackoverflow.com/questions/25288836/elpy-and-pylint-where-should-a-pylintrc-file-be-placed-in-order-to-customize-py
• https://www.reddit.com/r/emacs/comments/1s9f9y/using_a_functionhook_instead_of_dir_local/
• https://seandavi.github.io/post/2018-12-08-directory-local-variables-for-custom-emacs-projects/
• https://chromium.googlesource.com/chromiumos/chromite/+/master/.dir-locals.el
• How to use .dir-locals.el with Projectile?

Answer 1

The dir-locals file contains an alist of nested alists. This would be the correct form for your example of setting multiple variables for python-mode:

((python-mode . ((python-shell-buffer-name . "Python[This Project]")
                 (pyvenv-activate . "./envs/default")
                 (eval . (lambda ()  (setq flycheck-pylintrc ".pylintrc")))))
 (other-mode . (... ALIST)))

Answer 2

This is already answered, but just for another perspective:

If you just want to avoid syntax problems or view correct syntax, you can call add-dir-local-variable. It prompts for a mode, then a variable, then a setting. You can do this twice for the one mode, then open your .dir-locals.el file and view the correct syntax.