[issue16937] -u (unbuffered I/O) command line option documentation mismatch for sys.stdin
Roundup Robot added the comment: New changeset 4b33f74ab0f1 by Ezio Melotti in branch '3.3': #16937: document that stdin is always buffered, even when -u is used. Patch by Elena Oat. http://hg.python.org/cpython/rev/4b33f74ab0f1 New changeset 52f0aa0d552a by Ezio Melotti in branch 'default': #16937: merge with 3.3. http://hg.python.org/cpython/rev/52f0aa0d552a -- nosy: +python-dev ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue16937 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue16937] -u (unbuffered I/O) command line option documentation mismatch for sys.stdin
Ezio Melotti added the comment: Fixed, thanks for the patch! -- assignee: docs@python - ezio.melotti nosy: +ezio.melotti resolution: - fixed stage: - committed/rejected status: open - closed type: - enhancement ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue16937 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue16937] -u (unbuffered I/O) command line option documentation mismatch for sys.stdin
Changes by Elena Oat oat.el...@gmail.com: -- keywords: +patch Added file: http://bugs.python.org/file30804/issue16937.diff ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue16937 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue16937] -u (unbuffered I/O) command line option documentation mismatch for sys.stdin
New submission from Martijn Pieters: Run `python3.3 -h` and the `-u` option is documented as: -u : unbuffered binary stdout and stderr; also PYTHONUNBUFFERED=x see man page for details on internal buffering relating to '-u' Note that only `stdout` and `stderr` are mentioned. The online documentation at http://docs.python.org/3/using/cmdline.html#cmdoption-u doesn't agree: ... the binary layer of the stdin, stdout and stderr streams ... nor does `man python3.3`, which claims: -u Force the binary I/O layers of stdin, stdout and stderr to be unbuffered. The text I/O layer will still be line-buffered. So, is `stdin` going to be unbuffered, or not, when using `-u`? Running a simple test shows that `stdin` is firmly being buffered regardless of the `-u` switch: $ python3.3 -c 'import sys; print(sys.stdin.buffer, sys.stdout.buffer)' _io.BufferedReader name='stdin' _io.BufferedWriter name='stdout' $ python3.3 -u -c 'import sys; print(sys.stdin.buffer, sys.stdout.buffer)' _io.BufferedReader name='stdin' _io.FileIO name='stdout' mode='wb' I'll presume here that `stdin` is deliberately buffered, regardless, and that the documentation and man page are out of date here (in python 2, `-u` does include `stdin`). -- assignee: docs@python components: Documentation messages: 179718 nosy: docs@python, mjpieters priority: normal severity: normal status: open title: -u (unbuffered I/O) command line option documentation mismatch for sys.stdin versions: Python 3.3, Python 3.4 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue16937 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue16937] -u (unbuffered I/O) command line option documentation mismatch for sys.stdin
Changes by Georg Brandl ge...@python.org: -- nosy: +pitrou ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue16937 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue16937] -u (unbuffered I/O) command line option documentation mismatch for sys.stdin
Antoine Pitrou added the comment: Indeed, stdin is always buffered, simply because it doesn't make a difference (except if you're trying to read raw data from fd 0). -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue16937 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
