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-rw-r--r--sphinx/ext/inheritance_diagram.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/sphinx/ext/inheritance_diagram.py b/sphinx/ext/inheritance_diagram.py
index d10b89cc..6129da0c 100644
--- a/sphinx/ext/inheritance_diagram.py
+++ b/sphinx/ext/inheritance_diagram.py
@@ -306,7 +306,7 @@ class InheritanceDiagram(Directive):
class_names, env.temp_data.get('py:module'),
parts=node['parts'],
private_bases='private-bases' in self.options)
- except InheritanceException, err:
+ except InheritanceException as err:
return [node.document.reporter.warning(err.args[0],
line=self.lineno)]