From 43781b39a67f02ff4e9ae63484387f654dd045d4 2024-05-20 13:23:12
From: M Bussonnier <bussonniermatthias@gmail.com>
Date: 2024-05-20 13:23:12
Subject: [PATCH] Fix crash on completion for optional six modules (#14436)

closes #14434 
---

diff --git a/IPython/core/completerlib.py b/IPython/core/completerlib.py
index 9b97d70..5ce97ab 100644
--- a/IPython/core/completerlib.py
+++ b/IPython/core/completerlib.py
@@ -152,9 +152,14 @@ def get_root_modules():
     return rootmodules
 
 
-def is_importable(module, attr, only_modules):
+def is_importable(module, attr: str, only_modules) -> bool:
     if only_modules:
-        return inspect.ismodule(getattr(module, attr))
+        try:
+            mod = getattr(module, attr)
+        except ModuleNotFoundError:
+            # See gh-14434
+            return False
+        return inspect.ismodule(mod)
     else:
         return not(attr[:2] == '__' and attr[-2:] == '__')