我们从Python开源项目中，提取了以下12个代码示例，用于说明如何使用google.protobuf.message.optional_nested_message()。
def testFieldPresence(self): message = unittest_pb2.TestAllTypes() self.assertFalse(message.HasField("optional_int32")) self.assertFalse(message.HasField("optional_bool")) self.assertFalse(message.HasField("optional_nested_message")) with self.assertRaises(ValueError): message.HasField("field_doesnt_exist") with self.assertRaises(ValueError): message.HasField("repeated_int32") with self.assertRaises(ValueError): message.HasField("repeated_nested_message") self.assertEqual(0, message.optional_int32) self.assertEqual(False, message.optional_bool) self.assertEqual(0, message.optional_nested_message.bb) # Fields are set even when setting the values to default values. message.optional_int32 = 0 message.optional_bool = False message.optional_nested_message.bb = 0 self.assertTrue(message.HasField("optional_int32")) self.assertTrue(message.HasField("optional_bool")) self.assertTrue(message.HasField("optional_nested_message")) # Set the fields to non-default values. message.optional_int32 = 5 message.optional_bool = True message.optional_nested_message.bb = 15 self.assertTrue(message.HasField("optional_int32")) self.assertTrue(message.HasField("optional_bool")) self.assertTrue(message.HasField("optional_nested_message")) # Clearing the fields unsets them and resets their value to default. message.ClearField("optional_int32") message.ClearField("optional_bool") message.ClearField("optional_nested_message") self.assertFalse(message.HasField("optional_int32")) self.assertFalse(message.HasField("optional_bool")) self.assertFalse(message.HasField("optional_nested_message")) self.assertEqual(0, message.optional_int32) self.assertEqual(False, message.optional_bool) self.assertEqual(0, message.optional_nested_message.bb) # TODO(tibell): The C++ implementations actually allows assignment # of unknown enum values to *scalar* fields (but not repeated # fields). Once checked enum fields becomes the default in the # Python implementation, the C++ implementation should follow suit.
def testFieldPresence(self): message = unittest_proto3_arena_pb2.TestAllTypes() # We can't test presence of non-repeated, non-submessage fields. with self.assertRaises(ValueError): message.HasField('optional_int32') with self.assertRaises(ValueError): message.HasField('optional_float') with self.assertRaises(ValueError): message.HasField('optional_string') with self.assertRaises(ValueError): message.HasField('optional_bool') # But we can still test presence of submessage fields. self.assertFalse(message.HasField('optional_nested_message')) # As with proto2, we can't test presence of fields that don't exist, or # repeated fields. with self.assertRaises(ValueError): message.HasField('field_doesnt_exist') with self.assertRaises(ValueError): message.HasField('repeated_int32') with self.assertRaises(ValueError): message.HasField('repeated_nested_message') # Fields should default to their type-specific default. self.assertEqual(0, message.optional_int32) self.assertEqual(0, message.optional_float) self.assertEqual('', message.optional_string) self.assertEqual(False, message.optional_bool) self.assertEqual(0, message.optional_nested_message.bb) # Setting a submessage should still return proper presence information. message.optional_nested_message.bb = 0 self.assertTrue(message.HasField('optional_nested_message')) # Set the fields to non-default values. message.optional_int32 = 5 message.optional_float = 1.1 message.optional_string = 'abc' message.optional_bool = True message.optional_nested_message.bb = 15 # Clearing the fields unsets them and resets their value to default. message.ClearField('optional_int32') message.ClearField('optional_float') message.ClearField('optional_string') message.ClearField('optional_bool') message.ClearField('optional_nested_message') self.assertEqual(0, message.optional_int32) self.assertEqual(0, message.optional_float) self.assertEqual('', message.optional_string) self.assertEqual(False, message.optional_bool) self.assertEqual(0, message.optional_nested_message.bb)
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)
