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#!/usr/bin/env python3
# encoding: utf-8
"""
dotsandboxesagent.py
Template for the Machine Learning Project course at KU Leuven (2017-2018)
of Hendrik Blockeel and Wannes Meert.
Copyright (c) 2018 KU Leuven. All rights reserved.
"""
import sys
import argparse
import logging
import asyncio
import websockets
import json
from collections import defaultdict
import random
logger = logging.getLogger(__name__)
games = {}
agentclass = None
class DotsAndBoxesAgent:
"""Example Dots and Boxes agent implementation base class.
It returns a random next move.
A DotsAndBoxesAgent object should implement the following methods:
- __init__
- add_player
- register_action
- next_action
- end_game
This class does not necessarily use the best data structures for the
approach you want to use.
"""
def __init__(self, player, nb_rows, nb_cols, timelimit):
"""Create Dots and Boxes agent.
:param player: Player number, 1 or 2
:param nb_rows: Rows in grid
:param nb_cols: Columns in grid
:param timelimit: Maximum time allowed to send a next action.
"""
self.player = {player}
self.timelimit = timelimit
self.ended = False
self.nb_rows = nb_rows
self.nb_cols = nb_cols
rows = []
for ri in range(nb_rows + 1):
columns = []
for ci in range(nb_cols + 1):
columns.append({"v": 0, "h": 0})
rows.append(columns)
self.cells = rows
def add_player(self, player):
"""Use the same agent for multiple players."""
self.player.add(player)
def register_action(self, row, column, orientation, player):
"""Register action played in game.
:param row:
:param columns:
:param orientation: "v" or "h"
:param player: 1 or 2
"""
self.cells[row][column][orientation] = player
def next_action(self):
"""Return the next action this agent wants to perform.
In this example, the function implements a random move. Replace this
function with your own approach.
:return: (row, column, orientation)
"""
logger.info("Computing next move (grid={}x{}, player={})"\
.format(self.nb_rows, self.nb_cols, self.player))
# Random move
free_lines = []
for ri in range(len(self.cells)):
row = self.cells[ri]
for ci in range(len(row)):
cell = row[ci]
if ri < (len(self.cells) - 1) and cell["v"] == 0:
free_lines.append((ri, ci, "v"))
if ci < (len(row) - 1) and cell["h"] == 0:
free_lines.append((ri, ci, "h"))
if len(free_lines) == 0:
# Board full
return None
movei = random.randint(0, len(free_lines) - 1)
r, c, o = free_lines[movei]
return r, c, o
def end_game(self):
self.ended = True
## MAIN EVENT LOOP
async def handler(websocket, path):
logger.info("Start listening")
game = None
# msg = await websocket.recv()
try:
async for msg in websocket:
logger.info("< {}".format(msg))
try:
msg = json.loads(msg)
except json.decoder.JSONDecodeError as err:
logger.error(err)
return False
game = msg["game"]
answer = None
if msg["type"] == "start":
# Initialize game
if msg["game"] in games:
games[msg["game"]].add_player(msg["player"])
else:
nb_rows, nb_cols = msg["grid"]
games[msg["game"]] = agentclass(msg["player"],
nb_rows,
nb_cols,
msg["timelimit"])
if msg["player"] == 1:
# Start the game
nm = games[game].next_action()
print('nm = {}'.format(nm))
if nm is None:
# Game over
logger.info("Game over")
continue
r, c, o = nm
answer = {
'type': 'action',
'location': [r, c],
'orientation': o
}
else:
# Wait for the opponent
answer = None
elif msg["type"] == "action":
# An action has been played
r, c = msg["location"]
o = msg["orientation"]
games[game].register_action(r, c, o, msg["player"])
if msg["nextplayer"] in games[game].player:
# Compute your move
nm = games[game].next_action()
if nm is None:
# Game over
logger.info("Game over")
continue
nr, nc, no = nm
answer = {
'type': 'action',
'location': [nr, nc],
'orientation': no
}
else:
answer = None
elif msg["type"] == "end":
# End the game
games[msg["game"]].end_game()
answer = None
else:
logger.error("Unknown message type:\n{}".format(msg))
if answer is not None:
print(answer)
await websocket.send(json.dumps(answer))
logger.info("> {}".format(answer))
except websockets.exceptions.ConnectionClosed as err:
logger.info("Connection closed")
logger.info("Exit handler")
def start_server(port):
server = websockets.serve(handler, 'localhost', port)
print("Running on ws://127.0.0.1:{}".format(port))
asyncio.get_event_loop().run_until_complete(server)
asyncio.get_event_loop().run_forever()
## COMMAND LINE INTERFACE
def main(argv=None):
global agentclass
parser = argparse.ArgumentParser(description='Start agent to play Dots and Boxes')
parser.add_argument('--verbose', '-v', action='count', default=0, help='Verbose output')
parser.add_argument('--quiet', '-q', action='count', default=0, help='Quiet output')
parser.add_argument('port', metavar='PORT', type=int, help='Port to use for server')
args = parser.parse_args(argv)
logger.setLevel(max(logging.INFO - 10 * (args.verbose - args.quiet), logging.DEBUG))
logger.addHandler(logging.StreamHandler(sys.stdout))
agentclass = DotsAndBoxesAgent
start_server(args.port)
if __name__ == "__main__":
sys.exit(main())
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