From e7680611230333038b7f8d5b6765f3f22bebe1b6 2021-09-06 20:45:19
From: Matthias Bussonnier <bussonniermatthias@gmail.com>
Date: 2021-09-06 20:45:19
Subject: [PATCH] Merge pull request #13091 from madbird1304/madbird1304/issue#12897

Fix for issue #12897
---

diff --git a/IPython/terminal/interactiveshell.py b/IPython/terminal/interactiveshell.py
index 0fa9028..2714412 100644
--- a/IPython/terminal/interactiveshell.py
+++ b/IPython/terminal/interactiveshell.py
@@ -204,9 +204,8 @@ class TerminalInteractiveShell(InteractiveShell):
 
     @observe('editing_mode')
     def _editing_mode(self, change):
-        u_mode = change.new.upper()
         if self.pt_app:
-            self.pt_app.editing_mode = u_mode
+            self.pt_app.editing_mode = getattr(EditingMode, change.new.upper())
 
     @observe('autoformatter')
     def _autoformatter_changed(self, change):