diff --git a/src/inspectorscripts.ts b/src/inspectorscripts.ts
index 3bdbbac..53c1c64 100644
--- a/src/inspectorscripts.ts
+++ b/src/inspectorscripts.ts
@@ -152,7 +152,7 @@ def _jupyterlab_variableinspector_dict_list():
     def keep_cond(v):
         try:
             obj = eval(v)
-            if isinstance(obj, str):
+            if isinstance(obj, (bool, str, list, int, float, type(None))):
                 return True
             if __tf and isinstance(obj, __tf.Variable):
                 return True