William McIlhagga added the comment: Thanks, maybe I should get off my ass and contribute to the documentation then ...
On 16 November 2016 at 22:30, Mark Dickinson <rep...@bugs.python.org> wrote: > > Mark Dickinson added the comment: > > > Is this behaviour documented? Or are you just expected to know what C > does? > > Indeed, it's not as well documented as it should be. I think that's partly > for historical reasons: before Python 2.7, Python's % formatting > more-or-less delegated directly to the underlying C sprintf library > function, and so just inherited whatever the behaviour of that function > happened to be on the target operating system. Because the C standard > doesn't make guarantees about the behaviour of %f for ties, Python wasn't > in a position to do so either. > > But that excuse doesn't work any more with Python 2.7 and Python 3.x, > where on most (but still not all) platforms, we're consistently rounding > results using the usual round-ties-to-even rounding mode. > > There's a currently open issue (#17259) to improve the documentation here. > > ---------- > > _______________________________________ > Python tracker <rep...@bugs.python.org> > <http://bugs.python.org/issue28717> > _______________________________________ > -- Dr. William McIlhagga Bradford School of Optometry & Vision Science, Bradford University Great Horton Road Bradford BD7 1DP UK Room G23, Richmond tel. (44) (1274) 235957 ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue28717> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
