code: def testGaussian(self):
      data = [x / 100.0 for x in range(-50, 50)]
      envelope = [exp(-(x**2) / 2) for x in data]
      self.assertAlmostEqual(TCToTotal()(envelope), 0.5, 1e-3)
  
file_path: essentia/test/src/unittests/sfx/test_tctototal.py
imports: from essentia_test import *
  from math import exp
label_desc: Use image node_id 9 for calling the TestTCToTotal obj's underlying member method code with example usage: obj.testGaussian() without return types