On Dec 5, 12:56 pm, Mark Dickinson <dicki...@gmail.com> wrote: > On Dec 5, 8:25 pm, Raymond Hettinger <pyt...@rcn.com> wrote: > > > On Dec 5, 7:37 am, Anton81 <gerenu...@googlemail.com> wrote: > > > > I'd like to do calculations with floats and at some point equality of > > > two number will be checked. > > > What is the best way to make sure that equality of floats will be > > > detected, where I assume that mismatches beyond a certain point are > > > due to truncation errors? > > > Short answer: use round(). > > Can you explain how this would work? I'm imagining a test > something like: > > if round(x, 6) == round(y, 6): ... > > but that still would end up missing some cases where x and y > are equal to within 1ulp, which presumably isn't what's wanted:
if not round(x - y, 6): ... Raymond -- http://mail.python.org/mailman/listinfo/python-list
