Files
simplex-chat/packages/simplex-chat-python
Evgeny @ SimpleX Chat 99b91696f7 bots, nodejs: document chat, connection, member contact and network commands, typed commands in library (#7808)
* bots, nodejs: document chat, connection, member contact and network commands, typed commands in library

* bots, nodejs: restore apiConnect, wrap domain once, test all connect responses

* nodejs: JSDoc for new methods

* docs: plan for bot API commands and typed Node library methods

* tests: channel prepared with a domain has a verified SimpleX name

* docs: apply review fixes to the plan for bot API commands

* docs: apply second review pass to the plan for bot API commands

* docs: refer the bot API plan to the rewritten test commit

* docs: record decisions in the plan for bot API commands

* docs: plan tests of the generated Python command strings

* python: test the generated strings of the documented commands

* docs: plan the message information command for bots

* bots, nodejs: message information with the file servers for bots

* docs: plan the relay approval option of receiving files in Node

* nodejs: receive files without approving unknown relays

* docs: plan the user servers command for bots

* bots, nodejs: user servers and relays by operator for bots

* nodejs: document the message information method

* docs: plan the file upload progress event for bots

* bots: file upload progress event for bots

* bots: drop the file upload progress event

* docs: drop the upload progress event plan

* nodejs: document user servers and relay approval of received files
2026-10-31 22:30:16 +00:00
..

SimpleX Chat Python library

Python 3.11+ client for SimpleX Chat bots. Equivalent to the Node.js library.

Install

pip install simplex-chat

The native libsimplex is downloaded lazily on first use. To pre-fetch:

python -m simplex_chat install                     # sqlite (default)
python -m simplex_chat install --backend postgres  # linux-x86_64 only

Quick start

import re
from simplex_chat import Bot, BotProfile, Message, SqliteDb, TextMessage

bot = Bot(
    profile=BotProfile(display_name="Squaring bot"),
    db=SqliteDb(file_prefix="./squaring_bot"),
    welcome="Send me a number, I'll square it.",
)

@bot.on_message(content_type="text", text=re.compile(r"^-?\d+(\.\d+)?$"))
async def square(msg: TextMessage) -> None:
    n = float(msg.text or "0")
    await msg.reply(f"{n} * {n} = {n * n}")

@bot.on_message(content_type="text")
async def fallback(msg: Message) -> None:
    await msg.reply("Send me a number, like 7 or 3.14.")

if __name__ == "__main__":
    bot.run()

bot.run() blocks. The connection address is logged on startup — paste it into a SimpleX client to talk to the bot. Ctrl+C to stop.

Three decorators: @bot.on_message(...), @bot.on_command(name), @bot.on_event(tag). Message handlers are first-match-wins in registration order, so register specific filters first and catch-alls last.

See examples/squaring_bot.py for the full example.

Development

uv venv && source .venv/bin/activate
uv pip install -e '.[dev]'
ruff check && pyright && pytest tests/

Wire types under src/simplex_chat/types/_*.py are generated. Regenerate with cabal test simplex-chat-test --test-options='--match Python'.

License

AGPL-3.0