code: def testAllEmpty(self):
      # Testing for zero number of input mel-frames
      bandsAllEmpty = []
      self.assertRaises(
          EssentiaException, lambda: RhythmTransform()(bandsAllEmpty)
      )
  
file_path: essentia/test/src/unittests/rhythm/test_rhythmtransform.py
imports: from essentia_test import *
  import numpy
label_desc: Use image node_id 3 for calling the TestRhythmTransform obj's underlying member method code with example usage: obj.testAllEmpty() without return types