我们从Python开源项目中，提取了以下2个代码示例，用于说明如何使用google.protobuf.message.optional_bytes()。
def testPythonicInit(self): message = unittest_pb2.TestAllTypes( optional_int32=100, optional_fixed32=200, optional_float=300.5, optional_bytes=b'x', optionalgroup={'a': 400}, optional_nested_message={'bb': 500}, optional_nested_enum='BAZ', repeatedgroup=[{'a': 600}, {'a': 700}], repeated_nested_enum=['FOO', unittest_pb2.TestAllTypes.BAR], default_int32=800, oneof_string='y') self.assertIsInstance(message, unittest_pb2.TestAllTypes) self.assertEqual(100, message.optional_int32) self.assertEqual(200, message.optional_fixed32) self.assertEqual(300.5, message.optional_float) self.assertEqual(b'x', message.optional_bytes) self.assertEqual(400, message.optionalgroup.a) self.assertIsInstance(message.optional_nested_message, unittest_pb2.TestAllTypes.NestedMessage) self.assertEqual(500, message.optional_nested_message.bb) self.assertEqual(unittest_pb2.TestAllTypes.BAZ, message.optional_nested_enum) self.assertEqual(2, len(message.repeatedgroup)) self.assertEqual(600, message.repeatedgroup[0].a) self.assertEqual(700, message.repeatedgroup[1].a) self.assertEqual(2, len(message.repeated_nested_enum)) self.assertEqual(unittest_pb2.TestAllTypes.FOO, message.repeated_nested_enum[0]) self.assertEqual(unittest_pb2.TestAllTypes.BAR, message.repeated_nested_enum[1]) self.assertEqual(800, message.default_int32) self.assertEqual('y', message.oneof_string) self.assertFalse(message.HasField('optional_int64')) self.assertEqual(0, len(message.repeated_float)) self.assertEqual(42, message.default_int64) message = unittest_pb2.TestAllTypes(optional_nested_enum=u'BAZ') self.assertEqual(unittest_pb2.TestAllTypes.BAZ, message.optional_nested_enum) with self.assertRaises(ValueError): unittest_pb2.TestAllTypes( optional_nested_message={'INVALID_NESTED_FIELD': 17}) with self.assertRaises(TypeError): unittest_pb2.TestAllTypes( optional_nested_message={'bb': 'INVALID_VALUE_TYPE'}) with self.assertRaises(ValueError): unittest_pb2.TestAllTypes(optional_nested_enum='INVALID_LABEL') with self.assertRaises(ValueError): unittest_pb2.TestAllTypes(repeated_nested_enum='FOO') # Class to test proto3-only features/behavior (updated field presence & enums)
