New submission from raylu: https://docs.python.org/3.3/library/subprocess.html says
"bufsize will be supplied as the corresponding argument to the open() function when creating the stdin/stdout/stderr pipe file objects: ... 1 means line buffered" but it calls io.open with 'wb' and 'rb': http://hg.python.org/cpython/file/c9cb931b20f4/Lib/subprocess.py#l828 This puts the file in binary mode, and https://docs.python.org/3.3/library/functions.html#open says "1 to select line buffering (only usable in text mode)" Even with universal_newlines=True, the TextIOWrapper isn't passed line_buffering=True. There's actually no way to get line buffering any more. ---------- components: Library (Lib) messages: 217044 nosy: raylu priority: normal severity: normal status: open title: subprocess bufsize=1 docs are misleading versions: Python 3.3, Python 3.4, Python 3.5 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue21332> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
