johnnybt-trading

CI PyPI Python License: MIT

Runtime foundation for the johnnybt trading systems.

Four capabilities over one Tokio runtime, so a Python trading process gets concurrency without Python threads and without Python subprocesses: a timer, an embedded RESP server, an HTTP server, and async SQLite with a SQLAlchemy dialect. Everything asynchronous returns an ordinary awaitable, so it composes with asyncio like any other library.

There are no Python dependencies. Every capability is compiled into the extension module — a foundation that dragged a web framework and a database driver in behind it would not be a foundation.

pip install johnnybt-trading
# the SQLAlchemy dialect is optional
pip install "johnnybt-trading[sqlalchemy]"

Requires Python 3.14. That is the only version this is built against and tested on; the extension is compiled abi3, but nothing below 3.14 is claimed or supported.

Prebuilt wheels: Linux (x86_64, aarch64, musl x86_64), macOS (x86_64, arm64), Windows (x64) — one wheel per platform.

Timer

every ticks in Rust. A callback that runs long is a measured skip, not a silent drift, and never an overlapping run — the counters say which happened.

import johnnybt_trading as jbt

handle = jbt.every(0.2, tick, on_error=report, fire_immediately=True)
...
print(handle.fired, handle.skipped, handle.failed)
await handle.stop()

RESP server

RedisServer speaks enough Redis to be a real one to a client that cannot install anything to speak something else — which is the situation when the process on the far side is a broker terminal.

server = jbt.RedisServer(bind="127.0.0.1:6381", password=None, databases=16)
address = await server.start()
...
await server.stop()

Pub/sub is on the same object: server.publish(channel, payload) and server.subscribe(channel). A slow subscriber loses its oldest message rather than stalling the publisher.

HTTP server

Axum routing into Python coroutine handlers, plus a static directory served straight off disk.

server = jbt.HttpServer(bind="127.0.0.1:8080", on_error=report)
server.route("GET", "/healthz", lambda request: jbt.Response(200, b"ok"))
# Big files never enter Python: Range, conditional GET and compression for free.
server.static_dir("/assets", "dist/assets", cache_seconds=31536000, immutable=True)
address = await server.start()

SQLite

One connection per actor thread, ?-style parameters, and an event log that lives in the same database — which is what lets an event and the fact it describes commit together.

db = await jbt.connect("trades.db")
await db.execute("CREATE TABLE fills (id INTEGER PRIMARY KEY, code TEXT)")
await db.execute("INSERT INTO fills (code) VALUES (?)", ["002105.SZ"])

await db.create_event_schema()
await db.append_event("orders", "filled", b'{"code": "002105.SZ"}')
for event in await db.read_events("orders", after=0):
    ...

The SQLAlchemy async dialect registers itself, so sqlite+jbt:// resolves without an explicit call:

from sqlalchemy.ext.asyncio import create_async_engine

engine = create_async_engine("sqlite+jbt:///trades.db")

Pub/sub or event log?

Both ship, and they answer different questions. Pub/sub tells whoever is listening now — nothing is kept, a subscriber that was not there missed it. The event log tells whoever reads later — appended in order, read from a cursor, and durable in the same transaction as the change it describes.

Development

uv sync --all-extras --dev
uv run maturin develop --uv
uv run pytest
cargo test --lib

License

MIT

Project links

Data verified by PyPI on Sep 9, 2026
Data provided by the project maintainers, verified at the time the release was uploaded to PyPI.

Key dates

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  • Released:
Newer release available (0.1.1)

1 maintainer

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Avatar for mjason from gravatar.com mjason

Credits

Author: MJ

GitHub Statistics

Data verified by PyPI on Sep 9, 2026
The GitHub source repository was provided by the project maintainers and verified by PyPI at the time of upload. Stars, forks, and open issues/PRs are derived from that repository and have not been independently verified.

License expression

MIT
View SPDX License List

Requires

Python >=3.14

Provides Extra

sqlalchemy

Tags

trading tokio asyncio resp sqlite pyo3

Classifiers

Report project as malware

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