code: def test_feature_importances(self):
      with self.assertRaisesRegex(ValueError, "needed to tabulate"):
          table.feature_importances(None)
  
imports: from unittest import TestCase
  from sklearn_evaluation import table
label_desc: Use image node_id 1 for calling the TestMissingInput obj's underlying member method code with example usage: obj.test_feature_importances() without return types