code: def testEmpty(self):
      # Checks whether an empty input vector yields an exception
      self.assertComputeFails(self.initNsgconstantq(), [])
  
file_path: essentia/test/src/unittests/standard/test_nsgconstantq.py
imports: from essentia_test import *
  import numpy
label_desc: Use image node_id 6 for calling the TestNSGConstantQ obj's underlying member method code with example usage: obj.testEmpty() without return types