code: def testBetaSpline(self):
      beta1 = 1.0
      beta2 = 0.0
      expected = readVector(
          join(filedir(), "spline/betaSpline_1_0.txt")
      )
      self.evaluateBetaSpline(beta1, beta2, expected)
      print("\n\tbeta1=1.0, beta2=0.0 \tok")
  
      print("\tbeta1=1.0, beta2=100.0\tok")
      beta1 = 1.0
      beta2 = 100.0
      expected = readVector(
          join(filedir(), "spline/betaSpline_1_100.txt")
      )
      self.evaluateBetaSpline(beta1, beta2, expected)
  
      print("\tbeta1=100.0, beta2=0.0\tok")
      beta1 = 100.0
      beta2 = 0.0
      expected = readVector(
          join(filedir(), "spline/betaSpline_100_0.txt")
      )
      self.evaluateBetaSpline(beta1, beta2, expected)
  
file_path: essentia/test/src/unittests/standard/test_spline.py
imports: from essentia_test import *
  from essentia.standard import *
  from numpy import r_, sin, pi
label_desc: Use image node_id 8 for calling the TestSpline obj's underlying member method code with example usage: obj.testBetaSpline() without return types