New submission from Cezary Wagner <cezary.wag...@gmail.com>:
I have some problems with asyncio on Windows - it block where it should go. Documentation shows that it should work: https://docs.python.org/3/library/asyncio-stream.html -> StreamReader should return something. See 1st example: import asyncio import sys async def run_stockfish(): STOCKFISH_PATH = r'C:\root\chess\stockfish\stockfish 9\stockfish_9_x64_bmi2.exe' stockfish = await asyncio.subprocess.create_subprocess_exec( STOCKFISH_PATH, stdin=asyncio.subprocess.PIPE, stdout=asyncio.subprocess.PIPE, stderr=asyncio.subprocess.PIPE) stockfish.stdin.write('uci'.encode()) while True: # BUG? - blocks at this line - no output line = await stockfish.stdout.read() print(line) await stockfish.wait() if sys.platform == "win32": asyncio.set_event_loop_policy( asyncio.WindowsProactorEventLoopPolicy()) asyncio.run(run_stockfish(), debug=True) 1st output (nothing): Python 3.7.1 (v3.7.1:260ec2c36a, Oct 20 2018, 14:57:15) [MSC v.1915 64 bit (AMD64)] on win32 runfile('C:/Users/Cezary Wagner/PycharmProjects/stockfish-proxy/sandbox/async_proxy/s01_async_stockfish.py', wdir='C:/Users/Cezary Wagner/PycharmProjects/stockfish-proxy/sandbox/async_proxy') 2nd example: import asyncio import sys async def run_stockfish(): STOCKFISH_PATH = r'C:\root\chess\stockfish\stockfish 9\stockfish_9_x64_bmi2.exe' stockfish = await asyncio.subprocess.create_subprocess_exec( STOCKFISH_PATH, stdin=asyncio.subprocess.PIPE, stdout=asyncio.subprocess.PIPE, stderr=asyncio.subprocess.PIPE) stockfish.stdin.write('uci'.encode()) while True: # BUG? - blocks at this line line = await stockfish.stdout.readline() print(line) await stockfish.wait() if sys.platform == "win32": asyncio.set_event_loop_policy( asyncio.WindowsProactorEventLoopPolicy()) asyncio.run(run_stockfish(), debug=True) 2nd output is little better (first line is read): Python 3.7.1 (v3.7.1:260ec2c36a, Oct 20 2018, 14:57:15) [MSC v.1915 64 bit (AMD64)] on win32 runfile('C:/Users/Cezary Wagner/PycharmProjects/stockfish-proxy/sandbox/async_proxy/s01_async_stockfish.py', wdir='C:/Users/Cezary Wagner/PycharmProjects/stockfish-proxy/sandbox/async_proxy') b'Stockfish 9 64 BMI2 by T. Romstad, M. Costalba, J. Kiiski, G. Linscott\r\n' What should be done in both case (or maybe done): Stockfish 9 64 BMI2 by T. Romstad, M. Costalba, J. Kiiski, G. Linscott uci id name Stockfish 9 64 BMI2 id author T. Romstad, M. Costalba, J. Kiiski, G. Linscott option name Debug Log File type string default option name Contempt type spin default 20 min -100 max 100 option name Threads type spin default 1 min 1 max 512 option name Hash type spin default 16 min 1 max 131072 option name Clear Hash type button option name Ponder type check default false option name MultiPV type spin default 1 min 1 max 500 option name Skill Level type spin default 20 min 0 max 20 option name Move Overhead type spin default 30 min 0 max 5000 option name Minimum Thinking Time type spin default 20 min 0 max 5000 option name Slow Mover type spin default 89 min 10 max 1000 option name nodestime type spin default 0 min 0 max 10000 option name UCI_Chess960 type check default false option name SyzygyPath type string default <empty> option name SyzygyProbeDepth type spin default 1 min 1 max 100 option name Syzygy50MoveRule type check default true option name SyzygyProbeLimit type spin default 6 min 0 max 6 uciok ---------- components: Windows, asyncio messages: 330028 nosy: Cezary.Wagner, asvetlov, paul.moore, steve.dower, tim.golden, yselivanov, zach.ware priority: normal severity: normal status: open title: Windows asyncio reading continously stdin and stdout Stockfish versions: Python 3.7 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue35268> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com