Change tab width

Author: gabrielelanaro

extensions/python.el

@@ -2711,7 +2711,7 @@ to \"^python-\"."
 \\{python-mode-map}
 Entry to this mode calls the value of `python-mode-hook'
 if that value is non-nil."
-  (set (make-local-variable 'tab-width) 8)
+  (set (make-local-variable 'tab-width) 4)
   (set (make-local-variable 'indent-tabs-mode) nil)
 
   (set (make-local-variable 'comment-start) "# ")