code: def setUp(self):
      btss = BeatStateSpace(1, 4)
      self.om = RNNBeatTrackingObservationModel(btss, 4)
      self.obs = np.asarray([1, 0.1, 0.01, 0], dtype=np.float32)
  
imports: from __future__ import absolute_import, division, print_function
  import unittest
  from madmom.features.beats_hmm import *
label_desc: Use image node_id 1 for calling the TestRNNBeatTrackingObservationModelClass obj's underlying member method code with example usage: obj.setUp() without return types