Update tests_old/test_declare.py

Co-authored-by: Dimitri Yatsenko <dimitri@datajoint.com>

Author: ethho

tests_old/test_declare.py

@@ -348,11 +348,5 @@ def test_hidden_attributes():
             list(Experiment().heading._attributes.keys())[-1].split("_")[2]
             == "timestamp"
         )
-        assert (
-            len([a for a in Experiment().heading._attributes.values() if a.is_hidden])
-            != 0
-        )
-        assert (
-            len([a for a in Experiment().heading.attributes.values() if a.is_hidden])
-            == 0
-        )
+        assert any(a.is_hidden for a in Experiment().heading._attributes.values())
+        assert not any(a.is_hidden for a in Experiment().heading.attributes.values())