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-rw-r--r--Lib/idlelib/ClassBrowser.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/Lib/idlelib/ClassBrowser.py b/Lib/idlelib/ClassBrowser.py
index 338836a..240394b 100644
--- a/Lib/idlelib/ClassBrowser.py
+++ b/Lib/idlelib/ClassBrowser.py
@@ -98,7 +98,7 @@ class ModuleBrowserTreeItem(TreeItem):
for key, cl in dict.items():
if cl.module == name:
s = key
- if cl.super:
+ if hasattr(cl, 'super') and cl.super:
supers = []
for sup in cl.super:
if type(sup) is type(''):