code: def testZero(self):
      zeroOSS = zeros(1024)
      zeropositions = zeros(1024)
      lag = PercivalEvaluatePulseTrains()(zeroOSS, zeropositions)
      self.assertEqual(0.0, lag)
  
file_path: essentia/test/src/unittests/rhythm/test_percivalevaluatepulsetrains.py
imports: from essentia_test import *
  from essentia.standard import MonoLoader, PercivalEvaluatePulseTrains, HarmonicBpm, FrequencyBands, NoveltyCurve
label_desc: Use image node_id 2 for calling the TestPercivalEvaluatePulseTrains obj's underlying member method code with example usage: obj.testZero() without return types