Has anybody considered using the python "with" statement? I know
that's not what the keyword is used for, but wouldn't it be cool if
you could write:
with a > 0:
simplify(...)
On Nov 3, 4:10 pm, "Ondrej Certik" <[EMAIL PROTECTED]> wrote:
> On Sun, Nov 2, 2008 at 7:46 PM, Vinzent Steinberg
>
>
>
> <[EMAIL PROTECTED]> wrote:
>
> > On Nov 2, 3:30 am, Alan Bromborsky <[EMAIL PROTECTED]> wrote:
> >> Suppose you have a calculation where you are simplifying
> >> r*sin(theta)/sqrt(r**2*sin(theta)**2). Is there a way of specifying
> >> that r > 0 and 0 < theta < pi so that the result will simplify to 1
> >> rather than
> >> r*sin(theta)/(|r||sin(theta)|).
>
> > Have you tried this?
>
> >>>> r = Symbol('r', positive=True)
> >>>> r.is_positive
> > True
>
> > More complicated assumptions like 0 < theta < pi is afaik currently
> > not possible, but hopefully it will be implemented soon:
>
> > Seehttp://code.google.com/p/sympy/issues/detail?id=1047&q=assumptions.
>
> Thanks for the reply. Indeed, any help with assumptions is very much
> appreciated.
>
> Ondrej
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