testsAndMisc/python_pkg/lichess_bot
Krzysztof kuhy Rudnicki bb6713eabb fix(lint): convert os.path to pathlib - remove PTH per-file ignores
- Converted os.path patterns to pathlib.Path in 15+ files
- os.path.join → Path /
- os.path.dirname → Path.parent
- os.path.exists → Path.exists()
- os.path.isfile → Path.is_file()
- os.path.abspath → Path.resolve()
- os.mkdir → Path.mkdir()
- os.listdir → Path.iterdir()
- os.getcwd → Path.cwd()
- os.replace → Path.replace()
- Updated function type hints to accept str | Path

Added PTH123 (open() vs Path.open()) to global ignores as stylistic preference
2025-11-30 23:03:03 +01:00
..
tests fix(lint): convert os.path to pathlib - remove PTH per-file ignores 2025-11-30 23:03:03 +01:00
tools fix(lint): convert os.path to pathlib - remove PTH per-file ignores 2025-11-30 23:03:03 +01:00
__init__.py refactor: rename folders to fix N999, INP001, S311 linting rules 2025-11-30 21:20:17 +01:00
.bot_version refactor: rename folders to fix N999, INP001, S311 linting rules 2025-11-30 21:20:17 +01:00
engine.py fix(lint): convert os.path to pathlib - remove PTH per-file ignores 2025-11-30 23:03:03 +01:00
lichess_api.py fix(lint): LOG015 - replace root logger with module loggers 2025-11-30 21:59:24 +01:00
main.py fix(lint): convert os.path to pathlib - remove PTH per-file ignores 2025-11-30 23:03:03 +01:00
README.md refactor: rename folders to fix N999, INP001, S311 linting rules 2025-11-30 21:20:17 +01:00
requirements.txt refactor: rename folders to fix N999, INP001, S311 linting rules 2025-11-30 21:20:17 +01:00
run_tests.sh refactor: rename folders to fix N999, INP001, S311 linting rules 2025-11-30 21:20:17 +01:00
run.sh refactor: rename folders to fix N999, INP001, S311 linting rules 2025-11-30 21:20:17 +01:00
utils.py fix(lint): convert os.path to pathlib - remove PTH per-file ignores 2025-11-30 23:03:03 +01:00

Lichess Bot (minimal)

A small Lichess BOT that accepts standard challenges and plays quick random legal moves using python-chess. It demonstrates the Lichess Board API basics with a simple, readable implementation.

Features

  • Connects to Lichess Board API via streaming NDJSON
  • Accepts only standard chess challenges (bullet/blitz/rapid/classical)
  • Spawns a thread per active game
  • Plays random legal moves (swap in a stronger engine later)
  • Simple logging and basic retries on transient network errors

Requirements

  • Python 3.9+
  • A Lichess account that is activated as a BOT
  • A Lichess API access token with at least the scopes:
    • bot:play
    • challenge:read
    • challenge:write

Install dependencies:

pip install -r PYTHON/lichess_bot/requirements.txt

Activate BOT and get a token

  1. Create or use an existing Lichess account for your bot.
  2. Activate it as a BOT (one-time): https://lichess.org/api#tag/Bot
    • If not already BOT, you need to convert the account; follow Lichess docs.
  3. Create a personal API token: https://lichess.org/account/oauth/token/create
    • Grant scopes: bot:play, challenge:read, challenge:write

Export the token in your shell (recommended):

export LICHESS_TOKEN="your_bot_token_here"

Run

From the repo root:

python -m PYTHON.lichess_bot.main

Optional flags:

  • --log-level INFO|DEBUG|WARNING|ERROR (default: INFO)
  • --decline-correspondence (declines correspondence challenges)

You can also use the helper script:

bash PYTHON/lichess_bot/run.sh

Notes

  • The engine is intentionally weak (random moves). Swap it with a UCI engine or implement a better search in engine.py.
  • Network calls hit real Lichess endpoints. Keep the bot polite; respect rate limits.

Development

  • Small unit tests are in tests/ and only cover local helpers (no network). Run:
python -m pytest PYTHON/lichess_bot/tests -q

If you add tests requiring third-party packages, install them in your environment first.