MetaObjects (Python)
The Python port of the MetaObjects cross-language metadata standard: declare your typed entity model once, then generate idiomatic, drift-checked code across TypeScript, Java, C#, Python, and Kotlin. The metamodel is the durable spine; generated code is the disposable artifact.
Behavior is verified byte-for-byte against the same shared conformance corpora as every other language port.
Install
Requires Python 3.11+.
pip install metaobjects
The only runtime dependency is PyYAML.
Quick start
Load a directory of metadata (*.json canonical or sigil-free *.yaml):
from metaobjects import load_directory
result = load_directory("metaobjects/") # your *.json / *.yaml metadata files
if result.errors:
for err in result.errors:
print(err) # structured MetaError with a stable ErrorCode
else:
root = result.root # the merged metadata tree (a MetaData node)
print(root)
load_directory, load_uris, and load_string are module-level shortcuts over
MetaDataLoader; all return a LoadResult with the same field shape as the other ports.
What's in the package
The primary public API is the loader (load_directory / load_uris /
load_string, MetaDataLoader, LoadResult, ErrorCode, MetaError). The
distribution also ships the Python implementations of the other pillars used by the CLI
and tooling: codegen (Pydantic + FastAPI emit — reference generators you own:
metaobjects eject <name> copies one into your repo), render (Mustache + payload-VO +
verify), and runtime (a DB-API 2 ObjectManager — pg8000 / psycopg — no SQLAlchemy).
Schema migrations are owned by the TypeScript meta CLI (ADR-0015); there is
no migrate module in this distribution.
Authoring formats
- Canonical JSON (
*.json) — the cross-language interchange shape. - Sigil-free YAML (
*.yaml/*.yml) — the AI-first authoring front-end (ADR-0006). Desugared to canonical JSON at load time. A directory may mix both freely.
AI assistant context
To scaffold MetaObjects context files (.metaobjects/AGENTS.md, .metaobjects/CLAUDE.md, and
.claude/skills/metaobjects-*/) into your project so your AI assistant understands how to
author metadata and run codegen, use the Node meta CLI:
npx meta agent-docs --server python
(Running metaobjects agent-docs in the Python CLI prints this redirect and exits.)
Links
- Standard, docs, and the other four ports: https://metaobjects.dev
- Source & issues: https://github.com/metaobjectsdev/metaobjects
- Full docs: https://github.com/metaobjectsdev/metaobjects/tree/main/docs
License
Apache-2.0. See LICENSE.
1 maintainer
Release files for metaobjects 1.0.7
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| metaobjects-1.0.7.tar.gz | 924.3 kB | Details |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| metaobjects-1.0.7-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 1.5 MB
Release files / metaobjects-1.0.7.tar.gz
| Download URL | metaobjects-1.0.7.tar.gz |
|---|---|
| Size | 924.3 kB |
| Tags | Source |
|
SHA-256 checksum How to use checksums |
e69388e6f3f744b961e2fe2d34bdc54b3ad447d2d2613cccdbb35bd630145ec6
|
|
BLAKE2b-256 checksum How to use checksums |
c07f84d4cb1650498624da11af4070e6fd72270e074087a346d4511559608b6e
|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
No |
| Uploaded via |
twine/7.0.0 CPython/3.13.14
|
Release files / metaobjects-1.0.7-py3-none-any.whl
| Download URL | metaobjects-1.0.7-py3-none-any.whl |
|---|---|
| Size | 607.2 kB |
| Tags | Python 3 |
|
SHA-256 checksum How to use checksums |
b8b981a9950e6b0b4c1c85d36c7ba6d104fa039de79642cc6455cec27ec5d55b
|
|
BLAKE2b-256 checksum How to use checksums |
2e5816b907ca9f2dab4a0419533a78d27d883565dee3bc10958bdb4f521d3fec
|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
No |
| Uploaded via |
twine/7.0.0 CPython/3.13.14
|
