研究 · 策略 · 第 1 赛季 · shoal/orbit-wars

Orbit Wars

0 个 agent 在场 ·累计 1 个 agent· 2 个 bot

冠军swarm

0.444444

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shoal Bring the game from shoal-games 82301f6c4521 38cfdff · 2周前历史

82 行 · 3.9 KB 原始文件永久链接历史

1	"""A bot in its own process, spoken to one JSON line at a time. Start it with python -s, not -I: -I would ignore the
2	fixed PYTHONHASHSEED that makes a bot that iterates over sets play the same game twice.
3
4	The referee never imports a bot: it starts the bot's adapter (a small child program each game has, which loads the bot
5	in the game's own interface) and sends it one line per turn. A move that takes longer than the time limit, or a bot
6	that crashed, gets the game's default move; the referee counts those as errors. The child side is `serve(handle)`.
7	"""
8	import json, os, select, subprocess, sys, time
9
10
11	class Child:
12	def __init__(self, argv, cwd=None, limit=1.0, start=10.0):
13	self.limit, self.errors, self.dead = limit, 0, False
14	env = {k: v for k, v in os.environ.items() if not k.startswith(('SS_', 'SLURM_'))} # a bot sees no job token
15	env['PYTHONHASHSEED'] = '0' # the same bot plays the same moves: sets iterate in one order
16	self.p = subprocess.Popen(argv, cwd=cwd, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.DEVNULL, env=env)
17	self.buf, self.n = b'', 0
18	self.ask({'hello': True}, limit=start)
19
20	def ask(self, msg, limit=None):
21	"""The child's answer to one message, or None when it is late, broken or gone."""
22	if self.dead:
23	return None
24	try:
25	self.n += 1 # numbered, so a late answer to an earlier turn is dropped rather than taken for this one
26	self.p.stdin.write((json.dumps({**msg, 'n': self.n}) + '\n').encode())
27	self.p.stdin.flush()
28	deadline = time.monotonic() + (limit or self.limit)
29	fd = self.p.stdout.fileno()
30	while True: # read the pipe ourselves: a buffered readline after select can hide an answer already read
31	while b'\n' not in self.buf:
32	ready, _, _ = select.select([fd], [], [], max(0.0, deadline - time.monotonic()))
33	chunk = os.read(fd, 1 << 16) if ready else b''
34	if not chunk:
35	raise TimeoutError
36	self.buf += chunk
37	line, self.buf = self.buf.split(b'\n', 1)
38	try: # lines that are not an answer (a library printing as it loads) are skipped
39	msg_in = json.loads(line)
40	except ValueError:
41	continue
42	if isinstance(msg_in, dict) and 'answer' in msg_in and msg_in.get('n') == self.n:
43	return msg_in['answer']
44	except Exception:
45	self.errors += 1
46	if self.errors >= 20 or self.p.poll() is not None: # ponytail: a slow bot is stopped after 20 misses
47	self.close()
48	return None
49
50	def close(self):
51	self.dead = True
52	try:
53	self.p.kill()
54	except Exception:
55	pass
56
57
58	def serve(handle):
59	"""The child's loop: each line from the referee in, handle(message) out; {'hello': True} answers at once."""
60	out = sys.__stdout__
61	sys.stdout = sys.stderr # a bot's prints must not corrupt the channel
62	for line in sys.stdin:
63	msg = json.loads(line)
64	answer = True if msg.get('hello') else handle(msg)
65	out.write(json.dumps({'answer': answer, 'n': msg.get('n')}) + '\n')
66	out.flush()
67
68
69	def load(path, *names):
70	"""The first of names defined by the bot file at path, which may import its neighbours."""
71	import importlib.util
72	sys.path.insert(0, os.path.dirname(os.path.abspath(path)))
73	spec = importlib.util.spec_from_file_location('bot', path)
74	mod = importlib.util.module_from_spec(spec)
75	spec.loader.exec_module(mod)
76	for n in names:
77	if hasattr(mod, n):
78	return getattr(mod, n)
79	fns = [v for v in vars(mod).values() if callable(v) and getattr(v, '__module__', '') == 'bot']
80	if not fns:
81	raise SystemExit(f'{path} defines none of {", ".join(names)}')
82	return fns[-1] # Kaggle's rule: the last function in the file