How to use the pykeepass.exceptions.BinaryError function in pykeepass

def test_create_delete_binary(self):
        with self.assertRaises(BinaryError):
            self.kp.delete_binary(999)
        with self.assertRaises(BinaryError):
            e = self.kp.entries[0]
            e.add_attachment(filename='foo.txt', id=123)
            e.attachments[0].binary

        binary_id = self.kp.add_binary(b'Ronald McDonald Trump')
        self.kp.save()
        self.open()
        self.assertEqual(self.kp.binaries[binary_id], b'Ronald McDonald Trump')
        self.assertEqual(len(self.kp.attachments), 1)

        num_attach = len(self.kp.binaries)
        self.kp.delete_binary(binary_id)
        self.kp.save()
        self.open()

def test_create_delete_binary(self):
        with self.assertRaises(BinaryError):
            self.kp.delete_binary(999)
        with self.assertRaises(BinaryError):
            e = self.kp.entries[0]
            e.add_attachment(filename='foo.txt', id=123)
            e.attachments[0].binary

        binary_id = self.kp.add_binary(b'Ronald McDonald Trump')
        self.kp.save()
        self.open()
        self.assertEqual(self.kp.binaries[binary_id], b'Ronald McDonald Trump')
        self.assertEqual(len(self.kp.attachments), 1)

        num_attach = len(self.kp.binaries)
        self.kp.delete_binary(binary_id)
        self.kp.save()
        self.open()
        self.assertEqual(len(self.kp.binaries), num_attach - 1)

def binary(self):
        try:
            return self._kp.binaries[self.id]
        except IndexError:
            raise BinaryError('No such binary with id {}'.format(self.id))