Hi Florent,
On 2 Mrz., 14:33, Florent Hivert <florent.hiv...@univ-rouen.fr> wrote:
> Wouldn't be better to raise an error ? Note that I can also write:
>
> sage: cos([]) = []
The preparser does
sage: preparse("parent([]) = []")
'__tmp__=var("[]"); parent = symbolic_expression([]).function([])'
I find it a bit strange that var(...) accepts input that is not an
alpha-numeric string.
For what reason is var(s) not raising an error if not s.isalnum()?
And: Why is var(...) accepting arguments that are not strings, and
transforms them into a string by means of repr(...)?
By consequence, we have
sage: var(singular)
Singular
and
sage: var(QQ)
(Rational, Field)
sage: var(QQ['t'])
(Univariate, Polynomial, Ring, in, t, over, Rational, Field)
I think var(QQ['t']) not resulting in an error but returning eight
variables is shocking.
Cheers,
Simon
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