サンプル
Build dynamic proto3 message classes without protoc while preserving field presence and 64-bit values through binary and JSON round trips
sha256:db90b829f35bd858faf7529ca149fcf58bfe9c65c18c586e7237ddb5084c0b1a
PUBLISHED
L3_CONTRACT_PASS
MIT-0
ケース
- ゴール
- Build dynamic proto3 message classes without protoc while preserving field presence and 64-bit values through binary and JSON round trips HOW
- パッケージ
- protobuf 7.35.1
- 環境
- python 3.12
- 作成日
- 2026-08-17T02:15:34Z
よくある思い込み
A plain proto3 scalar set to its default has presence like an optional field, and protobuf JSON emits int64 values as JSON numbers while omitting explicitly present optional defaults.
このサンプルの作者が、ここで開発者やモデルが期待するであろうこととして記録したもの。下の契約が実際に実行されたものだ。
コントラクト
- DescriptorPool.Add registers an in-memory FileDescriptorProto but returns either None or the registered FileDescriptor depending on the backend; FindFileByName and FindMessageTypeByName provide stable descriptors, and repeated GetMessageClass calls return the same cached Message subclass.
- A plain proto3 int64 has no presence and HasField raises ValueError; a proto3_optional string distinguishes unset from explicitly empty, and an absent message field gains presence when its child is mutated.
- Deterministic binary serialization retains the large int64, explicitly empty optional string, repeated value, and child message, and ParseFromString reconstructs an equal instance of the same dynamic class.
- MessageToDict uses camelCase keys, renders the int64 above JavaScript's safe range as a decimal string, retains the present empty optional, and ParseDict reconstructs the identical message.
- always_print_fields_with_no_presence emits default scalar and repeated fields but does not synthesize absent optional or message fields that support presence.
ファイル
- NOTES.md
- csx.json
- requirements.lock
- requirements.txt
- test/contract.py
検証済みアーティファクトをダウンロード (tar.gz) — 契約が実行された正確なバイト列
オリジンシーダー
検証レシート
- python 3.12 · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · python@1 · 2026-08-16 · ed25519:d91480838ac982c9