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Created on 2021-04-08 09:33 by Andrey Moiseev, last changed 2022-04-11 14:59 by admin. This issue is now closed.
| Messages (2) | |||
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| msg390518 - (view) | Author: Andrey Moiseev (Andrey Moiseev) | Date: 2021-04-08 09:33 | |
sys.stdin.readline() in Windows console only allows 512 characters on input per line. So large pastes are truncated at 512 chars, which is a bit inconvenient for prototyping. The buffer size seems to be determined by BUFSIZ compile time constant: https://github.com/python/cpython/blob/63298930fb531ba2bb4f23bc3b915dbf1e17e9e1/Modules/_io/winconsoleio.c#L30-L31 In C, I am able to set a larger buffer at runtime with setvbuf() call: setvbuf(stdin, NULL, 0, 2024); But I can't seem to make it work through ctypes.cdll.msvcrt.setvbuf |
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| msg390520 - (view) | Author: Eryk Sun (eryksun) *  |
Date: 2021-04-08 09:46 | |
The limit of 512 characters is not for sys.stdin in general. It's for io._WindowsConsoleIO, which gets used as the raw file for non-redirected sys.stdin -- and opening "CON" and "CONIN$" -- if legacy mode isn't enabled. See bpo-41849. |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:59:44 | admin | set | github: 87937 |
| 2021-04-08 09:46:46 | eryksun | set | status: open -> closed superseder: Support reading long lines with io._WindowsConsoleIO nosy: + eryksun messages: + msg390520 resolution: duplicate stage: resolved |
| 2021-04-08 09:33:51 | Andrey Moiseev | create | |