code: def testInvalidSpec(self):
      with self.assertRaises(Exception):
          _x = Spec()
  
      with self.assertRaises(Exception):
          _x = Spec(description=3)
  
      with self.assertRaises(Exception):
          _x = Spec(description="123", singleNodeOnly=3)
  
file_path: nupic-legacy/tests/unit/nupic/regions/regions_spec_test.py
imports: import unittest2
  from nupic.regions.spec import Spec, InputSpec, OutputSpec, ParameterSpec, CommandSpec
label_desc: Use image node_id 9 for calling the KNNAnomalyClassifierRegionTest obj's underlying member method code with example usage: obj.testInvalidSpec() without return types