Wow! Such annotated! Very buffers!
It's not needed for pure-protobuf, but for the sake of an example, let's consider the following definition:
syntax = "proto3";
message SearchRequest {
string query = 1;
int32 page_number = 2;
int32 result_per_page = 3;
}And here's the same via pure-protobuf:
With dataclasses
from dataclasses import dataclass
from io import BytesIO
from pure_protobuf.annotations import Field
from pure_protobuf.message import BaseMessage
from typing_extensions import Annotated
@dataclass
class SearchRequest(BaseMessage):
query: Annotated[str, Field(1)] = ""
page_number: Annotated[int, Field(2)] = 0
result_per_page: Annotated[int, Field(3)] = 0
request = SearchRequest(query="hello", page_number=1, result_per_page=10)
buffer = bytes(request)
assert buffer == b"\x0A\x05hello\x10\x01\x18\x0A"
assert SearchRequest.read_from(BytesIO(buffer)) == requestWith pydantic
from io import BytesIO
from pure_protobuf.annotations import Field
from pure_protobuf.message import BaseMessage
from pydantic import BaseModel
from typing_extensions import Annotated
class SearchRequest(BaseMessage, BaseModel):
query: Annotated[str, Field(1)] = ""
page_number: Annotated[int, Field(2)] = 0
result_per_page: Annotated[int, Field(3)] = 0
request = SearchRequest(query="hello", page_number=1, result_per_page=10)
buffer = bytes(request)
assert buffer == b"\x0A\x05hello\x10\x01\x18\x0A"
assert SearchRequest.read_from(BytesIO(buffer)) == request