Fix incorrect usage of default_value in traitlets 5.3.*

rasmunk · rasmunk · commit a36e8d226e9a · 2022-09-14T12:20:51.000+02:00
diff --git a/ldap_hooks/hooks.py b/ldap_hooks/hooks.py
@@ -83,7 +83,7 @@ class LDAP(LoggingConfigurable):
 
     object_classes = List(
         trait=Unicode(),
-        default_value=None,
+        default_value=[],
         allow_none=False,
         config=True,
         help=dedent(
