* progmodes/python.el:

(python-indent-guess-indent-offset): If indentation is guessed
make python-indent-offset variable buffer local.

lisp/ChangeLog

+2012-11-26  Fabián Ezequiel Gallina  <fgallina@cuca>
+
+	* progmodes/python.el:
+	(python-indent-guess-indent-offset): If indentation is guessed
+	make python-indent-offset variable buffer local.
+
 2012-11-26  Fabián Ezequiel Gallina  <fgallina@cuca>
 
 	Fix Imenu regression.

lisp/progmodes/python.el

@@ -647,7 +647,7 @@ These make `python-indent-calculate-indentation' subtract the value of
                  (python-util-forward-comment)
                  (current-indentation))))
           (if indentation
-              (setq python-indent-offset indentation)
+              (set (make-local-variable 'python-indent-offset) indentation)
             (message "Can't guess python-indent-offset, using defaults: %s"
                      python-indent-offset)))))))