**, *^ are not valid Mathematica syntax for powers.
** is noncommutative multiplication
https://reference.wolfram.com/language/ref/NonCommutativeMultiply.html
and *^ is scientific notation
https://reference.wolfram.com/language/guide/Syntax.html
Also ^^ is the nnnn expressed in b-base
So the reason that ** had possibly worked before was that although it is
not parsed correctly in Mathematica parser,
it somewhat got parsed in sympify as a valid python syntax and I think that
it is completely wrong to parse it as power.
Actually, they are rarely used syntax for Mathematica that I didn't know
that they existed,
and especially *^ and ^^ are much more limited that it only works with
restricted classes of digits, with no symbolic capability,
and you can achieve the same thing with other Mathematica functions like
FromDigits.
For example, the bases for ^^ is restricted only for 2~36 because after it
exceeds 37, you will exhaust every digits 0~9 and English alphabets A~Z,
so if we are going to build parser for that, it must be considered.
On Tuesday, October 13, 2020 at 12:23:31 AM UTC+9 asme...@gmail.com wrote:
> It's probably not supported, but it could be added. The Mathematica
> parser is still relatively rudimentary, so a lot of syntax features of
> Mathematica aren't supported.
>
> Aaron Meurer
>
> On Mon, Oct 12, 2020 at 9:04 AM Roberto <franceschi...@gmail.com> wrote:
> >
> > from sympy.parsing.mathematica import mathematica
> >
> > Power with ** works
> > _mma = mathematica('3**2', {})
> > also the ^ works
> > _mma = mathematica('3^2', {})
> > but there seems to be a problem with *^ notation
> > _mma = mathematica('3*^2', {})
> > as ^ is parsed as **, without checking ahead if there is any "*^"
> > SympifyError: Sympify of expression 'could not parse '3***2'' failed,
> because of exception being raised: SyntaxError: invalid syntax (<string>,
> line 1)
> >
> > Am I misusing the parser?
> >
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>
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