code: def testStereoSample(self):
      p = Pool()
      p.add("foo", (3, 6))
  
      self.assertEqual(len(p["foo"]), 1)
      self.assertEqual(p["foo"][0][0], 3)
      self.assertEqual(p["foo"][0][1], 6)
  
      p.add("foo", (4, 5))
  
      self.assertEqual(len(p["foo"]), 2)
      self.assertEqual(p["foo"][1][0], 4)
      self.assertEqual(p["foo"][1][1], 5)
  
imports: from essentia_test import *
label_desc: Use image node_id 30 for calling the TestPool obj's underlying member method code with example usage: obj.testStereoSample() without return types