I don't think this is a bug that Sage can fix. When you execute RR(8059/9042) in Python, it first evaluates 8059/9042 which produces a float, then passes that to RR. There's no way for RR to know that you initially input a ratio of ints. David
On Mon, Apr 10, 2023 at 4:11 PM aw <aw.phone.00...@gmail.com> wrote: > when passing python ints to realfield, they don't get cast to sage integers > this can cause wrong answers > > example: > > RR=RealField(100) > > set_random_seed(3) > n1=randint(1000,9999) #n1=8059 > n2=randint(1000,9999) #n2=9042 > print(n1,'/',n2,'=',sep='') > print(RR(n1/n2)) #passing as 8059,9042 as python ints > > print() > > print(8059,'/',9042,'=',sep='') > print(RR(8059/9042)) #passing 8059,9042 as sage ints > > > output: > > 8059/9042= > 0.89128511391285114573435066632 > > 8059/9042= > 0.89128511391285113912851139128 > > the first one is wrong, the second one is right > > this bug is trivial to fix > when ints are passed to realfield, they should be automatically cast to > sage ints > > > -- > You received this message because you are subscribed to the Google Groups > "sage-devel" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to sage-devel+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/sage-devel/8bacb253-6d1c-4508-8b79-82ce7aea0caen%40googlegroups.com > <https://groups.google.com/d/msgid/sage-devel/8bacb253-6d1c-4508-8b79-82ce7aea0caen%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-devel/CAChs6_kH%2BHj599PMfS3WsO995Q_RE_ZEfV4zrT58JZb69foKBA%40mail.gmail.com.
