Hello,
It is a bug.
>What does the error "'Complement' object is not iterable" means? Google
not saying anything at all on this particular error messag
Solveset returns solution in Set. So if some values should not be included
in solution set, then it uses Complement.
e.g. In second case ans is `{-b*sqrt(1/(b**2 + 1)), b*sqrt(1/(b**2 + 1))} \
{1, -1}`
Here solution set is `{-b*sqrt(1/(b**2 + 1)), b*sqrt(1/(b**2 + 1))}` and
`{1-1}` set is not the part of answer (since it makes denominator of
*v/sympy.sqrt(-v**2
+ 1) *
equals to zero). Ans this overall solution type is
`sympy.sets.sets.Complement`.
Thanks for sharing it.
--
Shekhar
On Monday, 15 August 2016 17:13:20 UTC+5:30, Vassili Leonov wrote:
>
> I'm getting this error with
> >>> sympy.release.__version__
> '1.0'
>
> >>> import sympy
> >>> v,b = sympy.symbols('v b')
> >>>* sympy.solveset(v/sympy.sqrt(-v**2 + 1) - b, v)*
> Traceback (most recent call last):
> File "<string>", line 1, in <module>
> File
> "/base/data/home/apps/s~sympy-live-hrd/46.393464279709602171/sympy/sympy/solvers/solveset.py",
>
> line 791, in solveset
> return _solveset(f, symbol, domain, _check=True)
> File
> "/base/data/home/apps/s~sympy-live-hrd/46.393464279709602171/sympy/sympy/solvers/solveset.py",
>
> line 612, in _solveset
> solver)
> File
> "/base/data/home/apps/s~sympy-live-hrd/46.393464279709602171/sympy/sympy/solvers/solveset.py",
>
> line 507, in _solve_radical
> return FiniteSet(*[s for s in result if checksol(f, symbol, s) is
> True])
> TypeError: 'Complement' object is not iterable
>
> Same on my two different installations, same on http://live.sympy.org/
>
> *But it solves it fine after trivial transformation*:
>
> >>>* sympy.solveset(v**2/(-v**2 + 1) - b**2, v)*
> {-b*sqrt(1/(b**2 + 1)), b*sqrt(1/(b**2 + 1))} \ {-1, 1}
>
> *Is this the expected behaviour?*
> What does the error "'Complement' object is not iterable" means? Google
> not saying anything at all on this particular error message.
>
> Thank you for your time and consideration.
>
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