def testParameters(self): pdf = Laplace(1.5, 2.5) pdf.mu = 33 pdf.b = 44 self.assertEqual(pdf.mu, 33) self.assertEqual(pdf.b, 44) self.assertEqual(pdf.b, pdf['b']) def propertyAssignment(): pdf.b = -1 def directAssignment(): pdf['b'] = -1 self.assertRaises(ParameterValueError, propertyAssignment) self.assertRaises(ParameterValueError, directAssignment)