code: def testRational(self):
      result = Mean()([3.1459, -0.4444, 0.00002])
      self.assertAlmostEqual(result, 0.900506666667)
  
file_path: essentia/test/src/unittests/stats/test_mean.py
imports: from essentia_test import *
label_desc: Use image node_id 6 for calling the TestMean obj's underlying member method code with example usage: obj.testRational() without return types