code: def testInstantPower(self):
      sample = list(range(1, 11))
      p = 0
      for s in sample:
          p += s**2
      p /= float(len(sample))
  
      self.assertAlmostEqual(p, instantPower(sample))
  
file_path: essentia/test/src/unittests/base/test_utils.py
imports: from essentia_test import *
  import math
  import cmath
  import sys
label_desc: Use image node_id 2 for calling the TestUtils obj's underlying member method code with example usage: obj.testInstantPower() without return types