code: def testLogLowX(self):
      self.assertAlmostEqualVector(
          UnaryOperatorStream(type="log")(self.testInputLowX),
          [-69.07755, -69.07755, -69.07755, -69.07755],
      )
  
imports: from essentia_test import *
label_desc: Use image node_id 7 for calling the TestUnaryOperatorStream obj's underlying member method code with example usage: obj.testLogLowX() without return types