code: def testSqrt(self):
      # first take abs so we won't take sqrt of a negative (that test comes later)
      absInput = UnaryOperator(type="abs")(self.testInput)
      self.assertAlmostEqualVector(
          UnaryOperator(type="sqrt")(absInput),
          [
              1,
              1.414213562,
              1.732050808,
              2,
              1.843908891,
              2.236246856,
              316.281520168,
          ],
      )
  
imports: from essentia_test import *
label_desc: Use image node_id 15 for calling the TestUnaryOperator obj's underlying member method code with example usage: obj.testSqrt() without return types