Mark python-shell-virtualenv-root as safe for directories

* lisp/progmodes/python.el (python-shell-virtualenv-root):
Require a directory name.  (Bug#41619)

diff --git a/lisp/progmodes/python.el b/lisp/progmodes/python.el
index aec27a58dea50412a5e9c214116610e5d6eda5ce..0ce80db1993df1ca3317658b753c990d701a5023 100644 (file)
--- a/lisp/progmodes/python.el
+++ b/lisp/progmodes/python.el
@@ -2092,7 +2092,8 @@ executed through tramp connections."
 This variable, when set to a string, makes the environment to be
 modified such that shells are started within the specified
 virtualenv."
-  :type '(choice (const nil) string)
+  :type '(choice (const nil) directory)
+  :safe #'file-directory-p
   :group 'python)
 
 (defcustom python-shell-setup-codes nil