Change background color of python class and function definitions in Emacs

python-mode-ext.el

(font-lock-add-keywords 'python-mode
 '(("^\s*\\(def\s*\\)\\(.*\\)\\((.*):.*\xa\\)"
	(1 '(:inherit 'font-lock-keyword-face :background "#F3F3F3"))
	(2 '(:inherit 'font-lock-function-name-face :background "#F3F3F3" :weight bold))
	(3 '(:background "#F3F3F3"))
	)
  ("^\s*\\(class\s*\\)\\(.*\\)\\((.*):.*\xa\\)"
	(1 '(:inherit 'font-lock-keyword-face :background "#EEEEEE" :height 1.4))
	(2 '(:inherit 'font-lock-function-name-face :background "#EEEEEE" :height 1.4 :weight bold))
	(3 '(:background "#EEEEEE" :height 1.4))
	)
))