code: def testRealPoolSimple(self):
      expectedVal = 6.9
  
      p = Pool()
      p.add("foo.bar", expectedVal)
  
      self.assertAlmostEqualVector(p["foo.bar"], [expectedVal])
  
imports: from essentia_test import *
label_desc: Use image node_id 2 for calling the TestPool obj's underlying member method code with example usage: obj.testRealPoolSimple() without return types