def test_python_fraction(self):
        value = Fraction(13, 21)
        self.base.annotate(data=value)
        result = {'data': value}
        self.assertEqual(value, self.base.annotations['data'])
        self.assertDictEqual(result, self.base.annotations)
test to make sure Fraction type data is accepted
dataset/ETHPy150Open NeuralEnsemble/python-neo/neo/test/coretest/test_base.py/TestBaseNeoStandardLibraryTypes.test_python_fraction