New submission from Ivan Kravets <m...@ikravets.com>:
Hi there, It seems that "connect_read_pipe" is not implemented in ProactorEventLoop. Does it make sense to update docs in these places? - https://docs.python.org/3/library/asyncio-platforms.html#windows - https://docs.python.org/3/library/asyncio-eventloop.html#working-with-pipes Or, this is a bug? # The code to reproduce ``` import asyncio import sys async def read_stdin(): reader = asyncio.StreamReader() protocol = asyncio.StreamReaderProtocol(reader) await asyncio.get_running_loop().connect_read_pipe(lambda: protocol, sys.stdin) while True: line = await reader.readline() print("stdin > ", line) async def main(): task = asyncio.create_task(read_stdin()) await asyncio.sleep(5) task.cancel() if __name__ == "__main__": asyncio.run(main()) ``` P.S: The "loop.add_reader()" raises "NotImplementedError" which is clear according to the docs. Thanks in advance! # Log ``` C:\Users\USER>.platformio\python3\python.exe test.py Exception in callback _ProactorReadPipeTransport._loop_reading() handle: <Handle _ProactorReadPipeTransport._loop_reading()> Traceback (most recent call last): File "C:\Users\USER\.platformio\python3\lib\asyncio\proactor_events.py", line 299, in _loop_reading self._read_fut = self._loop._proactor.recv(self._sock, 32768) File "C:\Users\USER\.platformio\python3\lib\asyncio\windows_events.py", line 445, in recv self._register_with_iocp(conn) File "C:\Users\USER\.platformio\python3\lib\asyncio\windows_events.py", line 718, in _register_with_iocp _overlapped.CreateIoCompletionPort(obj.fileno(), self._iocp, 0, 0) OSError: [WinError 6] The handle is invalid During handling of the above exception, another exception occurred: Traceback (most recent call last): File "C:\Users\USER\.platformio\python3\lib\asyncio\events.py", line 80, in _run self._context.run(self._callback, *self._args) File "C:\Users\USER\.platformio\python3\lib\asyncio\proactor_events.py", line 309, in _loop_reading self._fatal_error(exc, 'Fatal read error on pipe transport') File "C:\Users\USER\.platformio\python3\lib\asyncio\proactor_events.py", line 131, in _fatal_error self._force_close(exc) File "C:\Users\USER\.platformio\python3\lib\asyncio\proactor_events.py", line 134, in _force_close if self._empty_waiter is not None and not self._empty_waiter.done(): AttributeError: '_ProactorReadPipeTransport' object has no attribute '_empty_waiter' Exception ignored in: <function _ProactorBasePipeTransport.__del__ at 0x000002181B927A60> Traceback (most recent call last): File "C:\Users\USER\.platformio\python3\lib\asyncio\proactor_events.py", line 116, in __del__ self.close() File "C:\Users\USER\.platformio\python3\lib\asyncio\proactor_events.py", line 108, in close self._loop.call_soon(self._call_connection_lost, None) File "C:\Users\USER\.platformio\python3\lib\asyncio\base_events.py", line 746, in call_soon self._check_closed() File "C:\Users\USER\.platformio\python3\lib\asyncio\base_events.py", line 510, in _check_closed raise RuntimeError('Event loop is closed') RuntimeError: Event loop is closed ``` ---------- components: asyncio messages: 388919 nosy: asvetlov, ivankravets, yselivanov priority: normal severity: normal status: open title: "connect_read_pipe" raises errors on Windows for STDIN versions: Python 3.9 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue43528> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
