On Thu, 26 Nov 2009 02:51:17 -0800 (PST)
Nathann Cohen <nathann.co...@gmail.com> wrote:
> Hmmmmmm.... After thinking about it for a bit, is using var() really a
> good solution ? It is fast and everything, but I use my variables in
> functions that should not spoil the userspace with them ! When I
> define symbolic variables, they are global and could even be accessed
> in the userspace... Can this be avoided ?
If you're using Cython you can bypass the global symbol registry and
construct your symbols using pynac directly.
This untested function (based on sage.symbolic.ring.SymbolicRing.symbol)
might work:
def my_symbol(name):
cdef GSymbol symb
GSymbol_construct_str(&symb, name)
cdef Expression e
e = <Expression>PY_NEW(Expression)
GEx_construct_symbol(&e._gobj, symb)
e._parent = SR
return e
You need to include sage/libs/ginac/decl.pxi to get the declarations of
GSymbol, GSymbol_construct_str, etc.
Cheers,
Burcin
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