如何在python模式下自定义emacs以突出显示运算符？

Question

我正在设置emacs作为我的python IDE,我在网上发现了很多解释自动完成的材料,以及其他各种功能.然而,我无法弄清楚的是如何让语法高亮显示器在运算符上突出显示魔法.

如何在python模式下自定义我的emacs以制作+ - 不同的颜色？我也喜欢它使整数,浮点数和圆括号也有不同的颜色.

Answer 1

我的编程模式实际上有这样的设置.这定义了两个独立的面,一个用于运算符,一个用于"结束语句"符号(显然在python中不太有用).您可以修改"\\([][|!.+=&/%*,<>(){}:^~-]+\\)"正则表达式以匹配您感兴趣的运算符,并将面部自定义为您想要的颜色.

(defvar font-lock-operator-face 'font-lock-operator-face)

(defface font-lock-operator-face
  '((((type tty) (class color)) nil)
    (((class color) (background light))
     (:foreground "dark red"))
    (t nil))
  "Used for operators."
  :group 'font-lock-faces)

(defvar font-lock-end-statement-face 'font-lock-end-statement-face)

(defface font-lock-end-statement-face
  '((((type tty) (class color)) nil)
    (((class color) (background light))
     (:foreground "DarkSlateBlue"))
    (t nil))
  "Used for end statement symbols."
  :group 'font-lock-faces)

(defvar font-lock-operator-keywords
  '(("\\([][|!.+=&/%*,<>(){}:^~-]+\\)" 1 font-lock-operator-face)
    (";" 0 font-lock-end-statement-face)))

然后,您只需通过向相关模式添加一个钩子来启用它(此示例假定您使用的是"python-mode"):

(add-hook 'python-mode-hook
                  '(lambda ()
                     (font-lock-add-keywords nil font-lock-operator-keywords t))
                  t t)

Answer 2

将以下内容放入 ~/.emacs 文件中：

;
; Python operator and integer highlighting
; Integers are given font lock's "constant" face since that's unused in python
; Operators, brackets are given "widget-inactive-face" for convenience to end-user 
;

(font-lock-add-keywords 'python-mode
    '(("\\<\\(object\\|str\\|else\\|except\\|finally\\|try\\|\\)\\>" 0 py-builtins-face)  ; adds object and str and fixes it so that keywords that often appear with : are assigned as builtin-face
    ("\\<[\\+-]?[0-9]+\\(.[0-9]+\\)?\\>" 0 'font-lock-constant-face) ; FIXME: negative or positive prefixes do not highlight to this regexp but does to one below
    ("\\([][{}()~^<>:=,.\\+*/%-]\\)" 0 'widget-inactive-face)))