William McIlhagga added the comment: OK, not wrong, just unexpected.
Is this behaviour documented? Or are you just expected to know what C does? On 16 November 2016 at 21:37, Mark Dickinson <rep...@bugs.python.org> wrote: > > Mark Dickinson added the comment: > > You don't say why you think this behaviour is wrong, or what you'd expect > to see instead. > > Nevertheless, this behaviour is by design: the code `'%.1f' % x` rounds > `x` to the nearest one-digit-after-the-point decimal number, and returns a > string representation of that number. In the case `x=0.25`, there is no > single nearest number: `0.2` and `0.3` are equally close to `0.25`, so a > choice between the two has to be made. In keeping with many other > languages, Python chooses the value with even last digit. (The original > behaviour is inherited from the typical behaviour of the standard library > strtod or dtoa functions in C.) > > ---------- > nosy: +mark.dickinson > resolution: -> not a bug > stage: -> resolved > status: open -> closed > > _______________________________________ > 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
