severity 28713 minor
tags 28713 + patch
quit

Lele Gaifax <lele@metapensiero.it> writes:

> have to do something like the following in one of my python-mode-hooks:
>
>   ;; Prettify only lambda keyword
>   (setq prettify-symbols-alist '(("lambda" . ?λ)))
>
>   ;; Force a refresh
>   (prettify-symbols-mode -1)
>   (prettify-symbols-mode))

Actually you could probably get away with

(with-eval-after-load 'python
  (setq python--prettify-symbols-alist '(("lambda" . ?λ))))

since defconst doesn't actually make anything const.

> This is of course a minor hassle, but I wonder if the major mode could/should
> use a normal variable (if not a defcustom) instead.

prettify-symbols-alist is not a defcustom, due to some uncertainty over
how to produce a reasonable interface for customizing it, if I recall
correctly.  So I think the python-mode version should not be a defcustom
either, but I see no reason against making it a normal variable: