diff --git a/module2/ressources/rr_org/init.el b/module2/ressources/rr_org/init.el
index 01b758661248c977b146cac2190c03ccfd7c13d4..b31ada9d601bf413573a7ba5ba67c91d845a7c82 100644
--- a/module2/ressources/rr_org/init.el
+++ b/module2/ressources/rr_org/init.el
@@ -13,7 +13,7 @@
 (setq org-babel-python-command
       (if (memq system-type '(windows-nt ms-dos))
           "Python"
-        "python3"))
+        "python3 -q"))
 
 ;; If the Python and R executables are on your system's search path,
 ;; you should not have to modify anything here. If Emacs does not find
@@ -257,3 +257,5 @@ Entered on %U
 (add-hook 'org-babel-after-execute-hook 'org-display-inline-images) 
 (add-hook 'org-mode-hook 'org-display-inline-images)
 (add-hook 'org-mode-hook 'org-babel-result-hide-all)
+
+(setq python-shell-completion-native-enable nil)
diff --git a/module2/ressources/rr_org/init.org b/module2/ressources/rr_org/init.org
index 60c3c6dd6ca3eba5c4c122419aa937459487bd53..cf259c1b136e551827db2cb4f11e9166c27d1fd7 100644
--- a/module2/ressources/rr_org/init.org
+++ b/module2/ressources/rr_org/init.org
@@ -36,7 +36,7 @@ document, simply =M-x org-babel-tangle=.
 (setq org-babel-python-command
       (if (memq system-type '(windows-nt ms-dos))
           "Python"
-        "python3"))
+        "python3 -q"))
 
 ;; If the Python and R executables are on your system's search path,
 ;; you should not have to modify anything here. If Emacs does not find
@@ -431,3 +431,9 @@ To use this type <B and then TAB. This comes with a session argument
 (add-hook 'org-mode-hook 'org-display-inline-images)
 (add-hook 'org-mode-hook 'org-babel-result-hide-all)
 #+end_src
+** Optimizing Python execution
+*** Don't use readline completion
+This often fails, yielding an ugly warning, and isn't of any use in Org-mode anyway
+#+begin_src emacs-lisp :tangle init.el
+(setq python-shell-completion-native-enable nil)
+#+end_src