code: def test_error(self):
      with self.assertRaises(TypeError):
          GradLogPDFGaussian(1, self.test_model)
      with self.assertRaises(ValueError):
          GradLogPDFGaussian([1, 1], self.test_model)
  
imports: import unittest
  import numpy
  from pgmpy.factors.distributions import GaussianDistribution
  from pgmpy.sampling import LeapFrog, ModifiedEuler, GradLogPDFGaussian
label_desc: Use image node_id 2 for calling the TestGradLogPDFGaussian obj's underlying member method code with example usage: obj.test_error() without return types