code: def testRegression(self):
      input = [
          1.0 / (i + 1) * sin(2 * pi * 440 * i / 44100)
          for i in range(22050)
      ]
      input += [0] * 22050
  
      gen = VectorInput(input)
      leq = sLeq()
      p = Pool()
  
      gen.data >> leq.signal
      leq.leq >> (p, "leq")
  
      run(gen)
  
      self.assertAlmostEqual(p["leq"], Leq()(input), 5e-5)
  
imports: from essentia_test import *
  from essentia.streaming import Leq
  from math import sin, pi
label_desc: Use image node_id 2 for calling the TestLeq_Streaming obj's underlying member method code with example usage: obj.testRegression() without return types