On Sat, 4 Jul 2020 at 16:05, Volker Weißmann
<volker.weissmann...@gmail.com> wrote:
>
> using sympy.S.Zero does silence the warning, but isinstance(somevar,
> sympy.S.Zero) does not work, because sympy.S.Zero is not the class but
> an object. How do I get the class Zero?

You can do `type(S.Zero)` to get the class. Normally though you can
test for an instance using `is`:

   x is S.Zero

Because Zero is a Singleton class it only has one instance.


Oscar

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