There have been bugs in the past where printers evaluate evaluate=False expressions. It looks like there is another such bug here. Can you open an issue for this?
Aaron Meurer On Mon, Jun 3, 2019 at 9:54 AM Jean ABOU SAMRA <j...@abou-samra.fr> wrote: > > Hi, > > Le 2 juin 2019 à 21:40, Oscar Benjamin <oscar.j.benja...@gmail.com> a écrit : > > Hi Jean, > > > Thanks for your quick answer. > > What version of SymPy are you using? > > This seems to work fine on SymPy master and with the most recent version > (1.4): > > > I'm also using 1.4. > > In [1]: repr(Mul(-1, 2, 5, evaluate=False)) > Out[1]: '-2*5' > > > True, but… > > >>> repr(Mul(-2, 5, evaluate=False)) > '-10' > > In fact, all the problem lies here: > > >>> # same... > ... srepr(Mul(-1, 2, 5, evaluate=False)) > 'Mul(Integer(-1), Integer(2), Integer(5))' > >>> srepr(Mul(-2, 5, evaluate=False)) > 'Mul(Integer(-1), Integer(2), Integer(5))' > >>> > >>> # but different > ... repr(Mul(-1, 2, 5, evaluate=False)) > '-2*5' > >>> repr(Mul(-2, 5, evaluate=False)) # Hoops! > '-10' > >>> > >>> # even weirder > ... init_printing() > >>> Mul(-1, 2, 5, evaluate=False) > -2⋅5 > >>> Mul(-2, 5, evaluate=False) # here all is fine! > -2⋅5 > > > Kind regards, > Jean Abou Samra > > -- > You received this message because you are subscribed to the Google Groups > "sympy" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to sympy+unsubscr...@googlegroups.com. > To post to this group, send email to sympy@googlegroups.com. > Visit this group at https://groups.google.com/group/sympy. > To view this discussion on the web visit > https://groups.google.com/d/msgid/sympy/45D94875-5286-4A9C-B9B2-7812DF70A0B7%40abou-samra.fr. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sympy+unsubscr...@googlegroups.com. To post to this group, send email to sympy@googlegroups.com. Visit this group at https://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/CAKgW%3D6JAVeHVXxx_VfBuPgxSv4RnKBSnV1vDxHMuo%3DsqwYN1NQ%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
