From 7c6152ff9eedabd45eb3e121387aae427a72b8b7 Mon Sep 17 00:00:00 2001
From: "Richard M. Stallman" <rms@gnu.org>
Date: Sat, 20 Nov 2004 20:39:16 +0000
Subject: [PATCH] (python-switch-to-python): If Python isn't running, start it.

---
 lisp/progmodes/python.el | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/lisp/progmodes/python.el b/lisp/progmodes/python.el
index 9be2c7599b..016e84270d 100644
--- a/lisp/progmodes/python.el
+++ b/lisp/progmodes/python.el
@@ -1235,9 +1235,13 @@ to this as appropriate.  Runs the hook `inferior-python-mode-hook'
   "Switch to the Python process buffer.
 With prefix arg, position cursor at end of buffer."
   (interactive "P")
-  (if (get-buffer python-buffer)
-      (pop-to-buffer python-buffer)
-    (error "No current process buffer.  See variable `python-buffer'"))
+  ;; Start python unless we have a buffer.
+  (unless (and python-buffer
+	       (get-buffer python-buffer))
+    (run-python nil t))
+  (pop-to-buffer python-buffer)
+  ;; Make extra sure python is running in this buffer.
+  (python-proc)
   (when eob-p
     (push-mark)
     (goto-char (point-max))))
-- 
2.39.2