How to use the pydicom.uid.UID function in pydicom

def test_presentation_context_transfer(self):
        """Check the presentation context generation transfer syntax"""
        # str -> UID
        ae = AE(scu_sop_class=['1.1'], transfer_syntax=['1.2.840.10008.1.2'])
        tran_syn = ae.presentation_contexts_scu[0].TransferSyntax[0]
        self.assertEqual(tran_syn, UID('1.2.840.10008.1.2'))
        self.assertTrue(isinstance(tran_syn, UID))

        # UID no change
        ae = AE(scu_sop_class=['1.2'], transfer_syntax=[b'1.2.840.10008.1.2'])
        tran_syn = ae.presentation_contexts_scu[0].TransferSyntax[0]
        self.assertEqual(tran_syn, UID('1.2.840.10008.1.2'))
        self.assertTrue(isinstance(tran_syn, UID))

        # bytes -> UID
        ae = AE(scu_sop_class=['1.3'], transfer_syntax=[UID('1.2.840.10008.1.2')])
        tran_syn = ae.presentation_contexts_scu[0].TransferSyntax[0]
        self.assertEqual(tran_syn, UID('1.2.840.10008.1.2'))
        self.assertTrue(isinstance(tran_syn, UID))

        # If not transfer syntax raise
        with self.assertRaises(ValueError):
            ae = AE(scu_sop_class=['1.3'], transfer_syntax=['1.2.840'])

        # If not str, bytes, UID raise
        with self.assertRaises(ValueError):
            ae = AE(scu_sop_class=['1.3'], transfer_syntax=[123456])

        # If not valid UID raise
        with self.assertRaises(ValueError):
            ae = AE(scu_sop_class=['1.3'], transfer_syntax=['1.2.3.4.5.'])

def test_properties(self):
        """ Check property setters and getters """
        item = SOPClassExtendedNegotiationSubItem()

        # SOP Class UID
        item.sop_class_uid = '1.1.1'
        self.assertEqual(item.sop_class_uid, UID('1.1.1'))
        self.assertEqual(item.sop_class_uid_length, 5)
        self.assertTrue(isinstance(item.sop_class_uid, UID))
        item.sop_class_uid = b'1.1.2.1'
        self.assertEqual(item.sop_class_uid, UID('1.1.2.1'))
        self.assertEqual(item.sop_class_uid_length, 7)
        self.assertTrue(isinstance(item.sop_class_uid, UID))
        item.sop_class_uid = UID('1.1.3.1.1')
        self.assertEqual(item.sop_class_uid, UID('1.1.3.1.1'))
        self.assertEqual(item.sop_class_uid_length, 9)
        self.assertTrue(isinstance(item.sop_class_uid, UID))

        self.assertEqual(item.UID, item.sop_class_uid)

        with self.assertRaises(TypeError):
            item.sop_class_uid = 10002

        pdu = A_ASSOCIATE_RQ()
        pdu.Decode(a_associate_rq_user_id_ext_neg)

        item = pdu.user_information.ext_neg[0]

def test_properies(self):
        """ Check property setters and getters """
        uid = ImplementationClassUIDSubItem()
        uid.implementation_class_uid = '1.2.826.0.1.3680043.9.3811.0.9.1'

        self.assertEqual(uid.implementation_class_uid, UID('1.2.826.0.1.3680043.9.3811.0.9.1'))

        uid.implementation_class_uid = b'1.2.826.0.1.3680043.9.3811.0.9.2'
        self.assertEqual(uid.implementation_class_uid, UID('1.2.826.0.1.3680043.9.3811.0.9.2'))

        uid.implementation_class_uid = UID('1.2.826.0.1.3680043.9.3811.0.9.3')
        self.assertEqual(uid.implementation_class_uid, UID('1.2.826.0.1.3680043.9.3811.0.9.3'))

        with self.assertRaises(TypeError):
            uid.implementation_class_uid = 10002

def test_to_primitive(self):
        """ Check converting to primitive """
        pdu = A_ASSOCIATE_RQ()
        pdu.Decode(a_associate_rq_com_ext_neg)

        item = pdu.user_information.common_ext_neg[0]

        result = item.ToParams()

        check = SOPClassCommonExtendedNegotiation()

        check.sop_class_uid = UID('1.2.840.10008.5.1.4.1.1.4')
        check.service_class_uid = UID('1.2.840.10008.4.2')
        check.related_general_sop_class_identification = [UID('1.2.840.10008.5.1.4.1.1.88.22')]

        self.assertEqual(result, check)

def test_to_primitive(self):
        """ Check converting to primitive """
        pdu = A_ASSOCIATE_RQ()
        pdu.Decode(a_associate_rq_com_ext_neg)

        item = pdu.user_information.common_ext_neg[0]

        result = item.ToParams()

        check = SOPClassCommonExtendedNegotiation()

        check.sop_class_uid = UID('1.2.840.10008.5.1.4.1.1.4')
        check.service_class_uid = UID('1.2.840.10008.4.2')
        check.related_general_sop_class_identification = [UID('1.2.840.10008.5.1.4.1.1.88.22')]

        self.assertEqual(result, check)

primitive.sop_class_uid = UID('1.2.840.10008.5.1.4.1.1.2')
        self.assertTrue(primitive.sop_class_uid == reference_uid)

        # Service Class UID
        primitive.service_class_uid = b'1.2.840.10008.5.1.4.1.1.2'
        self.assertTrue(primitive.service_class_uid == reference_uid)

        primitive.service_class_uid = '1.2.840.10008.5.1.4.1.1.2'
        self.assertTrue(primitive.service_class_uid == reference_uid)

        primitive.service_class_uid = UID('1.2.840.10008.5.1.4.1.1.2')
        self.assertTrue(primitive.service_class_uid == reference_uid)

        # Related General SOP Class Identification
        ref_uid_list = [UID('1.2.840.10008.5.1.4.1.1.2'),
                        UID('1.2.840.10008.5.1.4.1.1.3'),
                        UID('1.2.840.10008.5.1.4.1.1.4')]

        uid_list = []
        uid_list.append(b'1.2.840.10008.5.1.4.1.1.2')
        uid_list.append('1.2.840.10008.5.1.4.1.1.3')
        uid_list.append(UID('1.2.840.10008.5.1.4.1.1.4'))
        primitive.related_general_sop_class_identification = uid_list
        self.assertTrue(primitive.related_general_sop_class_identification == ref_uid_list)

        with self.assertRaises(TypeError):
            primitive.related_general_sop_class_identification = 'test'

        ## Check exceptions
        # SOP Class UID
        with self.assertRaises(TypeError):

primitive.service_class_uid = '1.2.840.10008.5.1.4.1.1.2'
        self.assertTrue(primitive.service_class_uid == reference_uid)

        primitive.service_class_uid = UID('1.2.840.10008.5.1.4.1.1.2')
        self.assertTrue(primitive.service_class_uid == reference_uid)

        # Related General SOP Class Identification
        ref_uid_list = [UID('1.2.840.10008.5.1.4.1.1.2'),
                        UID('1.2.840.10008.5.1.4.1.1.3'),
                        UID('1.2.840.10008.5.1.4.1.1.4')]

        uid_list = []
        uid_list.append(b'1.2.840.10008.5.1.4.1.1.2')
        uid_list.append('1.2.840.10008.5.1.4.1.1.3')
        uid_list.append(UID('1.2.840.10008.5.1.4.1.1.4'))
        primitive.related_general_sop_class_identification = uid_list
        self.assertTrue(primitive.related_general_sop_class_identification == ref_uid_list)

        with self.assertRaises(TypeError):
            primitive.related_general_sop_class_identification = 'test'

        ## Check exceptions
        # SOP Class UID
        with self.assertRaises(TypeError):
            primitive.sop_class_uid = 10

        with self.assertRaises(TypeError):
            primitive.sop_class_uid = 45.2

        with self.assertRaises(ValueError):
            primitive.sop_class_uid = 'abc'

def test_to_primitive(self):
        """ Check converting to primitive """
        pdu = A_ASSOCIATE_RQ()
        pdu.Decode(a_associate_rq)

        uid = pdu.user_information.user_data[1]

        result = uid.ToParams()

        check = ImplementationClassUIDNotification()
        check.implementation_class_uid = UID('1.2.826.0.1.3680043.9.3811.0.9.0')
        self.assertEqual(result, check)

def test_abstract_syntax(self):
        """Test abstract syntax setter"""
        pc = PresentationContext(1)
        pc.AbstractSyntax = '1.1.1'
        self.assertEqual(pc.AbstractSyntax, UID('1.1.1'))
        self.assertTrue(isinstance(pc.AbstractSyntax, UID))
        pc.AbstractSyntax = b'1.2.1'
        self.assertEqual(pc.AbstractSyntax, UID('1.2.1'))
        self.assertTrue(isinstance(pc.AbstractSyntax, UID))
        pc.AbstractSyntax = UID('1.3.1')
        self.assertEqual(pc.AbstractSyntax, UID('1.3.1'))
        self.assertTrue(isinstance(pc.AbstractSyntax, UID))

        pc.AbstractSyntax = UID('1.4.1.')
        self.assertEqual(pc.AbstractSyntax, UID('1.3.1'))
        self.assertTrue(isinstance(pc.AbstractSyntax, UID))

the transfer syntax will not be used for matching. If the value
            corresponds to an uncompressed syntax then matches will be made
            with any uncompressed transfer syntaxes.
        role : str
            One of 'scu' or 'scp', the required role of the context.
        context_id : int or None
            If not None then the ID of the presentation context to use. It will
            be checked against the available parameter values.

        Returns
        -------
        presentation.PresentationContext
            An accepted presentation context.
        """
        ab_syntax = UID(ab_syntax)
        tr_syntax = UID(tr_syntax)

        possible_contexts = []
        if context_id is None:
            possible_contexts = self.accepted_contexts
        else:
            for cx in self.accepted_contexts:
                if cx.context_id == context_id:
                    possible_contexts = [cx]
                    break

        for cx in possible_contexts:
            if cx.abstract_syntax != ab_syntax:
                continue

            # Cover both False and None
            if role == 'scu' and cx.as_scu is not True: