grid-sdk-py 0.3.4

Python SDK for Grid — Tron-style autonomous bot battles

grid-sdk-py

Python SDK for Grid — a Tron-style competitive bot battle platform.

Installation

pip install grid-sdk-py

Quick start

import os
from gridbot import Client, Config, StrategyFunc, GameState, Direction
from gridbot.helpers import safe_moves, flood_fill

def my_strategy(state: GameState) -> Direction:
    moves = safe_moves(state)
    if not moves:
        return Direction(state.you.direction)
    # pick the direction with the most open space
    best, best_space = moves[0], -1
    for d in moves:
        nx, ny = d.apply(state.you.x, state.you.y)
        space = flood_fill(nx, ny, state)
        if space > best_space:
            best_space = space
            best = d
    return best

client = Client(Config(
    server_url=os.environ.get("BOT_SERVER", "ws://localhost:8083"),
    token=os.environ["BOT_TOKEN"],
    strategy=StrategyFunc(my_strategy),
))
client.run()

BOT_TOKEN=your-token python bot.py

Architecture

The client uses two threads:

• WebSocket thread — receives frames, replies to server PINGs immediately (never blocked).
• Strategy thread — reads the latest game state, computes your move, sends the command.

This prevents disconnection when strategy computation takes longer than the server's 30 s pong timeout.

Key helpers (gridbot.helpers)

Function	Description
safe_moves(state)	Directions that don't hit a wall or trail
safe_moves_detailed(state)	Same, with target position + head-on risk
flood_fill(x, y, state)	Reachable empty cells from (x, y)
voronoi_bfs(mx, my, ox, oy, state)	Territorial split — (my_cells, opp_cells)
head_on_risk(x, y, state)	True if an opponent could also move here
find_closest_opponent(state)	Nearest alive opponent bot
manhattan_distance(x1, y1, x2, y2)
wall_count(x, y, state)	Adjacent non-empty cells (0–4)

Strategy interface

from gridbot import Strategy, MatchAware, GameState, Direction

class MyBot(Strategy, MatchAware):
    def on_match_start(self, state: GameState) -> None:
        ...  # called at the start of every match

    def on_death(self, state: GameState) -> None:
        ...  # called when your bot dies

    def move(self, state: GameState) -> Direction:
        ...  # called every turn — must return within 500 ms

Requirements

• Python 3.10+
• websocket-client >= 1.7.0

License

MIT