Python proto3 enum 编译后得不到对应的枚举值类吗, 如果可以的话如何得到? - V2EX
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Python proto3 enum 编译后得不到对应的枚举值类吗, 如果可以的话如何得到?

  •  
  •   vegetableChick 2023-08-25 18:16:22 +08:00 1615 次点击
    这是一个创建于 787 天前的主题,其中的信息可能已经有所发展或是发生改变。

    我在 common.proto 中定义了两个枚举类型

    syntax = "proto3"; package common; message ClientTypeEnum { enum ClientType { SM = 0; VL = 1; } }; enum ErrCode{ PayCenterErrorCode_SUCCESS = 0; PayCenterErrorCode_REQ_PARAMS_ERROR = 1000000; PayCenterErrorCode__ERROR = 1000001; PayCenterErrorCode__UNKNOWN_ERROR = 1000002; PayCenterErrorCode__ACCOUNT_NOT_EXIST = 1000003; } 

    用下面的编译命令进行编译后

     python -m grpc_tools.protoc --proto_path=. \ --experimental_allow_proto3_optional \ --error_format=gcc \ --python_out=./py_interface/ --grpc_python_out=./py_interface/ common.proto 

    得到了 common_pb2.py

    # -*- coding: utf-8 -*- # Generated by the protocol buffer compiler. DO NOT EDIT! # source: api/pay_center/common/common.proto """Generated protocol buffer code.""" from google.protobuf.internal import enum_type_wrapper from google.protobuf import descriptor as _descriptor from google.protobuf import message as _message from google.protobuf import reflection as _reflection from google.protobuf import symbol_database as _symbol_database # @@protoc_insertion_point(imports) _sym_db = _symbol_database.Default() DESCRIPTOR = _descriptor.FileDescriptor( name='api/pay_center/common/common.proto', package='common', syntax='proto3', serialized_optiOns=b'Z=git.domob-inc.cn/bluevision/bv_interface_go/pay_center/common', create_key=_descriptor._internal_create_key, serialized_pb=b'\n\"api/pay_center/common/common.proto\x12\x06\x63ommon\"j\n\x0e\x43lientTypeEnum\x12\x36\n\x0b\x63lient_type\x18\x01 \x01(\x0e\x32!.common.ClientTypeEnum.ClientType\" \n\nClientType\x12\x07\n\x03SMB\x10\x00\x12\t\n\x05\x42V_VL\x10\x01*\xcb\x01\n\x07\x45rrCode\x12\x1e\n\x1aPayCenterErrorCode_SUCCESS\x10\x00\x12)\n#PayCenterErrorCode_REQ_PARAMS_ERROR\x10\xc0\x84=\x12\x1f\n\x19PayCenterErrorCode__ERROR\x10\xc1\x84=\x12\'\n!PayCenterErrorCode__UNKNOWN_ERROR\x10\xc2\x84=\x12+\n%PayCenterErrorCode__ACCOUNT_NOT_EXIST\x10\xc3\x84=B?Z=git.domob-inc.cn/bluevision/bv_interface_go/pay_center/commonb\x06proto3' ) _ERRCODE = _descriptor.EnumDescriptor( name='ErrCode', full_name='common.ErrCode', filename=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key, values=[ _descriptor.EnumValueDescriptor( name='PayCenterErrorCode_SUCCESS', index=0, number=0, serialized_optiOns=None, type=None, create_key=_descriptor._internal_create_key), _descriptor.EnumValueDescriptor( name='PayCenterErrorCode_REQ_PARAMS_ERROR', index=1, number=1000000, serialized_optiOns=None, type=None, create_key=_descriptor._internal_create_key), _descriptor.EnumValueDescriptor( name='PayCenterErrorCode__ERROR', index=2, number=1000001, serialized_optiOns=None, type=None, create_key=_descriptor._internal_create_key), _descriptor.EnumValueDescriptor( name='PayCenterErrorCode__UNKNOWN_ERROR', index=3, number=1000002, serialized_optiOns=None, type=None, create_key=_descriptor._internal_create_key), _descriptor.EnumValueDescriptor( name='PayCenterErrorCode__ACCOUNT_NOT_EXIST', index=4, number=1000003, serialized_optiOns=None, type=None, create_key=_descriptor._internal_create_key), ], containing_type=None, serialized_optiOns=None, serialized_start=155, serialized_end=358, ) _sym_db.RegisterEnumDescriptor(_ERRCODE) ErrCode = enum_type_wrapper.EnumTypeWrapper(_ERRCODE) PayCenterErrorCode_SUCCESS = 0 PayCenterErrorCode_REQ_PARAMS_ERROR = 1000000 PayCenterErrorCode__ERROR = 1000001 PayCenterErrorCode__UNKNOWN_ERROR = 1000002 PayCenterErrorCode__ACCOUNT_NOT_EXIST = 1000003 _CLIENTTYPEENUM_CLIENTTYPE = _descriptor.EnumDescriptor( name='ClientType', full_name='common.ClientTypeEnum.ClientType', filename=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key, values=[ _descriptor.EnumValueDescriptor( name='SM', index=0, number=0, serialized_optiOns=None, type=None, create_key=_descriptor._internal_create_key), _descriptor.EnumValueDescriptor( name='VL', index=1, number=1, serialized_optiOns=None, type=None, create_key=_descriptor._internal_create_key), ], containing_type=None, serialized_optiOns=None, serialized_start=120, serialized_end=152, ) _sym_db.RegisterEnumDescriptor(_CLIENTTYPEENUM_CLIENTTYPE) _CLIENTTYPEENUM = _descriptor.Descriptor( name='ClientTypeEnum', full_name='common.ClientTypeEnum', filename=None, file=DESCRIPTOR, containing_type=None, create_key=_descriptor._internal_create_key, fields=[ _descriptor.FieldDescriptor( name='client_type', full_name='common.ClientTypeEnum.client_type', index=0, number=1, type=14, cpp_type=8, label=1, has_default_value=False, default_value=0, message_type=None, enum_type=None, containing_type=None, is_extension=False, extension_scope=None, serialized_optiOns=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), ], extensiOns=[ ], nested_types=[], enum_types=[ _CLIENTTYPEENUM_CLIENTTYPE, ], serialized_optiOns=None, is_extendable=False, syntax='proto3', extension_ranges=[], Oneofs=[ ], serialized_start=46, serialized_end=152, ) _CLIENTTYPEENUM.fields_by_name['client_type'].enum_type = _CLIENTTYPEENUM_CLIENTTYPE _CLIENTTYPEENUM_CLIENTTYPE.containing_type = _CLIENTTYPEENUM DESCRIPTOR.message_types_by_name['ClientTypeEnum'] = _CLIENTTYPEENUM DESCRIPTOR.enum_types_by_name['ErrCode'] = _ERRCODE _sym_db.RegisterFileDescriptor(DESCRIPTOR) ClientTypeEnum = _reflection.GeneratedProtocolMessageType('ClientTypeEnum', (_message.Message,), { 'DESCRIPTOR' : _CLIENTTYPEENUM, '__module__' : 'api.pay_center.common.common_pb2' # @@protoc_insertion_point(class_scope:common.ClientTypeEnum) }) _sym_db.RegisterMessage(ClientTypeEnum) DESCRIPTOR._optiOns= None # @@protoc_insertion_point(module_scope) 

    为什么编译后没有生成对应的 Enum 类型, 如果可以的话 如何调整才能获取

    class ClientTypeEnum(proto.Message): class ClientType(proto.Enum): SM = 0 VL = 1 

    开发环境 Python 3.9.17 + ibprotoc 3.17.3 + mac 12.5.1

    python -m grpc_tools.protoc libprotoc 3.17.3 

    刚开始用protobuffer协议,所以不太懂原理,求教大家, 谢谢

    4 条回复    2023-08-25 21:54:34 +08:00
    so1n
        1
    so1n  
       2023-08-25 18:22:17 +08:00
    Protobuf 生成的代码类型并不是 Python 的类型,它们只是长得像 Python 对应的类型而已,比如 map, reapeated 之类的,如果你在 pymysql 中使用,要显式的把他们转为 list, dict
    flyqie
        2
    flyqie  
       2023-08-25 18:22:59 +08:00
    syntax = "proto3";

    common_pb2.py

    。。。。?
    e3c78a97e0f8
        3
    e3c78a97e0f8  
       2023-08-25 19:17:29 +08:00 via iPhone
    ClientTypeEnum = _reflection.GeneratedProtocolMessageType('ClientTypeEnum', (_message.Message,), {
    'DESCRIPTOR' : _CLIENTTYPEENUM,
    '__module__' : 'api.pay_center.common.common_pb2'
    # @@protoc_insertion_point(class_scope:common.ClientTypeEnum)
    })

    这不是有吗
    flyqie
        4
    flyqie  
       2023-08-25 21:54:34 +08:00
    @flyqie #2

    抽空看了下文档,是我见识短浅了。。

    `Currently both proto2 and proto3 use _pb2.py for their generated files.`

    关于 enum 官方文档: https://protobuf.dev/reference/python/python-generated/#enum

    好像方法还挺多,你试试?
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