xoryaml 0.1.0

yaml serializer and deserializer backed by yaml_rust2

xoryaml

Yet Another YAML library for Python ;)

print(
    xoryaml.dumps(
        {
            "name": "xoryaml",
            "released": datetime.datetime.now(datetime.timezone.utc),
        }
    )
)
# ---
# name: xoryaml
# released: "2025-03-08T17:01:14.569027Z"

Why?

I wanted a memory-safe and reasonably fast YAML library that could handle datetime types. It takes inspiration (as well as a bit of the test suite) from orjson.

In order to keep the interface to native code as simple as possible, I have implemented part of the interface in Python. Not sure if this is a bad idea, but it seems to work fine? Let me know otherwise ;)

Thanks

This project would not be possible without:

• pyo3: Rust-python interop
• yaml-rust2: Pure Rust YAML impl
• orjson: Parts of test suite
• ryaml: Parts of test suite
• speedate (pydantic): Date formatting

Build

• Install maturin
• Run maturin develop --release

Tests

• Install tox: uv tool install tox --with tox-uv
• Run: tox