From 80d230d5c2d3b5a31f6307926b929d972ad8b8be Mon Sep 17 00:00:00 2001
From: Marc Wouts <marc.wouts@gmail.com>
Date: Tue, 13 Nov 2018 00:05:05 +0100
Subject: [PATCH] Failsafe on kernelspec errors #120

https://travis-ci.com/mwouts/jupytext/jobs/158056709
---
 jupytext/contentsmanager.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/jupytext/contentsmanager.py b/jupytext/contentsmanager.py
index 1c8ddb397..b5302146b 100644
--- a/jupytext/contentsmanager.py
+++ b/jupytext/contentsmanager.py
@@ -31,7 +31,7 @@ def kernelspec_from_language(language):
             ks = get_kernel_spec(name)
             if ks.language == language:
                 return {'name': name, 'language': language, 'display_name': ks.display_name}
-    except KeyError:
+    except (KeyError, ValueError):
         pass
     return None