New submission from Olav Morken: The documentation for the `-u`-flag (https://docs.python.org/3/using/cmdline.html#cmdoption-u) contains:

The text I/O layer will still be line-buffered if writing to the console, or block-buffered if redirected to a non-interactive file.

This does not appear to be the case -- instead it is always line-buffered: https://hg.python.org/cpython/file/v3.5.1/Python/pylifecycle.c#l1041 Attached is a trivial patch that simply removes everything after "line-buffered". ---------- assignee: docs@python components: Documentation files: fix-doc-unbuffered.patch keywords: patch messages: 264910 nosy: docs@python, olavmrk priority: normal severity: normal status: open title: Incorrect documentation for `-u`-flag Added file: http://bugs.python.org/file42736/fix-doc-unbuffered.patch _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue26964> _______________________________________