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), 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
Download files
Download the file for your platform. If you're not sure which to choose, learn more about installing packages.
Source Distribution
Built Distribution
Filter files by name, interpreter, ABI, and platform.
If you're not sure about the file name format, learn more about wheel file names.
Copy a direct link to the current filters
File details
Details for the file metaobjects-0.24.3.tar.gz.
File metadata
- Download URL: metaobjects-0.24.3.tar.gz
- Upload date:
- Size: 723.2 kB
- Tags: Source
- Uploaded using Trusted Publishing? No
- Uploaded via:
uv/0.9.18 {"installer":{"name":"uv","version":"0.9.18","subcommand":["publish"]},"python":null,"implementation":{"name":null,"version":null},"distro":{"name":"Pop!_OS","version":"22.04","id":"jammy","libc":null},"system":{"name":null,"release":null},"cpu":null,"openssl_version":null,"setuptools_version":null,"rustc_version":null,"ci":null}
File hashes
| Algorithm | Hash digest | |
|---|---|---|
| SHA256 |
ac59fd90bd6f8da27034d76fff31e6968fd52422078e8977731fef660a145896
|
|
| MD5 |
40377f589f0c0c53af7030eae9cc6924
|
|
| BLAKE2b-256 |
d49a17ec8ebb966ad836f5f57fb5606dd697d820ff90c7bc5b2f57720a793284
|
File details
Details for the file metaobjects-0.24.3-py3-none-any.whl.
File metadata
- Download URL: metaobjects-0.24.3-py3-none-any.whl
- Upload date:
- Size: 512.0 kB
- Tags: Python 3
- Uploaded using Trusted Publishing? No
- Uploaded via:
uv/0.9.18 {"installer":{"name":"uv","version":"0.9.18","subcommand":["publish"]},"python":null,"implementation":{"name":null,"version":null},"distro":{"name":"Pop!_OS","version":"22.04","id":"jammy","libc":null},"system":{"name":null,"release":null},"cpu":null,"openssl_version":null,"setuptools_version":null,"rustc_version":null,"ci":null}
File hashes
| Algorithm | Hash digest | |
|---|---|---|
| SHA256 |
d938545eab743bfce4fbf03b0a4862078502e95f92a8abc1dd1664b73f2745b3
|
|
| MD5 |
43acb52ada2f899b5a78a5a64ce7081d
|
|
| BLAKE2b-256 |
7165853281c4f4e20a6980e83d8951b349632de35922ba85a72fd2a4a57e7909
|
