code: def testMulti(self):
      result = Mean()([5, 8, 4, 9, 1])
      self.assertAlmostEqual(result, 5.4)
  
file_path: essentia/test/src/unittests/stats/test_mean.py
imports: from essentia_test import *
label_desc: Use image node_id 4 for calling the TestMean obj's underlying member method code with example usage: obj.testMulti() without return types