Python 3.6 supports F strings, eg:
So:
print(f'Test {} me!'.format(2 + 2)) Can be written as:
print(f'Test {2 + 2} me!') Which print's Test 4 me, Is there a way to adjust emacs syntax highlighting so the text between the {...} shows using regular code syntax-highlighting (instead of the same highlighting as a string).
The mentioned bug thread provides a workaround hack, which works on some simple cases. I extended that hack a bit, to better address my use cases:
(defconst brace-regexp "[^{]{[^{}]*}") (defconst python-f-string-regexp "f\\('.*?[^\\]'\\|\".*?[^\\]\"\\)") (defun python-f-string-font-lock-find (limit) (while (re-search-forward python-f-string-regexp limit t) (put-text-property (match-beginning 0) (match-end 0) 'face 'font-lock-string-face) (let ((start (match-beginning 0))) (while (re-search-backward brace-regexp start t) (put-text-property (1+ (match-beginning 0)) (match-end 0) 'face 'font-lock-type-face)))) nil) (with-eval-after-load 'python (font-lock-add-keywords 'python-mode `((python-f-string-font-lock-find)) 'append)) Good stuff:
f.{}{{ does not trigger highlighting Bad stuff:{} contains a }, then expression highlight will be cut off there{} get all the same colour (I arbitrarily picked the 'type' face because it contrasts well with strings on my system)Try https://github.com/karlotness/tree-sitter.el , works perfectly for me.
;; Core APIs. (straight-register-package '(tsc :host github :repo "ubolonton/emacs-tree-sitter" :files ("core/*.el"))) ;; Base framework, syntax highlighting. (use-package tree-sitter :straight (:host github :repo "ubolonton/emacs-tree-sitter" :files ("lisp/*.el")) :diminish (tree-sitter-mode) :hook ((after-init . global-tree-sitter-mode) (tree-sitter-after-on . tree-sitter-hl-mode))) ;; Language bundle. (use-package tree-sitter-langs :straight (:host github :repo "ubolonton/emacs-tree-sitter" :files ("langs/*.el" "langs/queries")) :demand t :after tree-sitter) 