sympify is *NOT* safe. It calls eval. The same tricks that you can
use to do nasty things with eval can be used from sympify. Who is
hyping it as safe?
I don't think it can be made safe either (if anyone has any ideas,
feel free to discuss them, though). The only way to protect against
arbitrar
Hi there,
sympify() is hyped as the safe alternative to evil eval().
Is it really that safe that there is no way to pass a string to
sympy.sympify().evalf() to harm the system?
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>> I suspect these people are falling into the trap of seeing the
>> simplicity of the option 1 invariant over the option 3 invariant,
>> without noticing that it really leads to more complicated code.
>
> I am clearly one of those nutheads. From their perspective it's a reasonable
> assumption t
Sorry, I was traveling and away from the computer for a while.
> So my recommendation here goes back to using Symbol as the first
> argument of MatrixSymbol. Also, the class should clearly not subclass
> from Symbol in this case (I don't remember if it already does).
MatrixSymbol does not subc
