code: def testNullValue(self):
      self.assertEqual(
          GeometricMean()([1, 23, 46, 2, 6, 13, 0, 35, 57, 3]), 0
      )
  
imports: from essentia_test import *
label_desc: Use image node_id 3 for calling the TestGeometricMean obj's underlying member method code with example usage: obj.testNullValue() without return types