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amlitt4 opened this issue Feb 28, 2024 · 4 comments
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Protocol Buffer Basics: Python #124

amlitt4 opened this issue Feb 28, 2024 · 4 comments

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@amlitt4
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amlitt4 commented Feb 28, 2024 •
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The code snippet referenced in section "The Protocol Buffer API" is no longer accurate. Section should be updated to reflect how latest python code is compiled. meta_class is no longer used.

The previous code snippet:
class Person(message.Message):
metaclass = reflection.GeneratedProtocolMessageType

class PhoneNumber(message.Message):
metaclass = reflection.GeneratedProtocolMessageType
DESCRIPTOR = _PERSON_PHONENUMBER
DESCRIPTOR = _PERSON

class AddressBook(message.Message):
metaclass = reflection.GeneratedProtocolMessageType
DESCRIPTOR = _ADDRESSBOOK

Compiled code using latest repository on 2/28/24:

"""Generated protocol buffer code."""
from google.protobuf import descriptor as _descriptor
from google.protobuf import descriptor_pool as _descriptor_pool
from google.protobuf import symbol_database as _symbol_database
from google.protobuf.internal import builder as _builder
_sym_db = _symbol_database.Default()

DESCRIPTOR = _descriptor_pool.Default().AddSerializedFile(b'\n\x11\x61\x64\x64ressbook.proto\x12\x08tutorial"\xd9\x02\n\x06Person\x12\x11\n\x04name\x18\x01 \x01(\tH\x00\x88\x01\x01\x12\x0f\n\x02id\x18\x02 \x01(\x05H\x01\x88\x01\x01\x12\x12\n\x05\x65mail\x18\x03 \x01(\tH\x02\x88\x01\x01\x12,\n\x06phones\x18\x04 \x03(\x0b\x32\x1c.tutorial.Person.PhoneNumber\x1a\x65\n\x0bPhoneNumber\x12\x13\n\x06number\x18\x01 \x01(\tH\x00\x88\x01\x01\x12-\n\x04type\x18\x02 \x01(\x0e\x32\x1a.tutorial.Person.PhoneTypeH\x01\x88\x01\x01\x42\t\n\x07_numberB\x07\n\x05_type"h\n\tPhoneType\x12\x1a\n\x16PHONE_TYPE_UNSPECIFIED\x10\x00\x12\x15\n\x11PHONE_TYPE_MOBILE\x10\x01\x12\x13\n\x0fPHONE_TYPE_HOME\x10\x02\x12\x13\n\x0fPHONE_TYPE_WORK\x10\x03\x42\x07\n\x05_nameB\x05\n\x03_idB\x08\n\x06_email"/\n\x0b\x41\x64\x64ressBook\x12 \n\x06people\x18\x01 \x03(\x0b\x32\x10.tutorial.Personb\x06proto3')

_globals = globals()
_builder.BuildMessageAndEnumDescriptors(DESCRIPTOR, _globals)
_builder.BuildTopDescriptorsAndMessages(DESCRIPTOR, 'addressbook_pb2', _globals)
if _descriptor._USE_C_DESCRIPTORS == False:
DESCRIPTOR._options = None
_globals['_PERSON']._serialized_start=32
_globals['_PERSON']._serialized_end=377
_globals['_PERSON_PHONENUMBER']._serialized_start=144
_globals['_PERSON_PHONENUMBER']._serialized_end=245
_globals['_PERSON_PHONETYPE']._serialized_start=247
_globals['_PERSON_PHONETYPE']._serialized_end=351
_globals['_ADDRESSBOOK']._serialized_start=379
_globals['_ADDRESSBOOK']._serialized_end=426
@Logofile
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Thanks for the suggested updates! I'm checking with our main Python developer to confirm that I can import these updates.

@Logofile
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Our main Python developer confirmed that the generated code is different now and metaclass is not used any more. I'll work on incorporating your updates.

@Logofile
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Still on my radar.

@Logofile
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I applied these changes; thank you for providing them!

@chwarr chwarr mentioned this issue May 24, 2025
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