Why do they need to be set in a global dictionary? You can already set whatever attributes you want on an atomic object. So long as __eq__ checks against them it should work. I usually recommend storing things in args if you can, as it makes things a lot simpler, but it isn't required, at least for args == () objects.
Aaron Meurer On Thu, Apr 20, 2017 at 9:33 AM, Francesco Bonazzi <[email protected]> wrote: > Do you think it could make sense to have attributes for atoms in SymPy? > > Sometimes it could be convenient to store information on certain > expressions, like SymPy atoms. > > It came into the discussion of: > https://github.com/sympy/sympy/pull/12490 > > In this PR, IndexedBase is being loaded with more arguments. Potentially > more arguments could be added in the future and through different kinds of > objects (arrays and matrices could also be assigned the attributes discussed > in that PR). > > In Mathematica, atttributes are supported: > > https://reference.wolfram.com/language/ref/SetAttributes.html > https://reference.wolfram.com/language/ref/Attributes.html > > > In Mathematica only a limited set of attributes can be assigned, and it's > generally about basic mathematical behaviour. > > > We could potentially have a dictionary or a set assigned to atoms in a > hidden global dictionary in sympy.core. What do you think? > > > > -- > 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 [email protected]. > To post to this group, send email to [email protected]. > 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/b4a612ef-7756-447b-996a-865fc9dd5968%40googlegroups.com. > 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 [email protected]. To post to this group, send email to [email protected]. 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%3D6JBNFL1P_7m--mNEJ0wciHA3cicuVrVn8NrPwjPbhSHSg%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
