Maybe this then?
sage: from sympy import *
sage: Symbol("x")
x
sage: f = 3*x^2
sage: str(f.as_basic())
'3*x**2'
On Sat, May 9, 2009 at 7:56 AM, Laurent <moky.m...@gmail.com> wrote:
>
>
>>
>> sage: str(latex(g))
>> '{3 {x}^{2} }'
>>
>> what you want?
>>
> I would prefer 3*(x**2)
> {3 {x}^{2} }
> is not a valid pstricks's syntax, and I don't see how to manipulate it
> in order to get something valid.
> Maybe I can make the replacement { -> ( and } ->), but I fear some side
> effect of the LaTeX syntax for \sin, \exp or others ...
> Moreover, I don't know how to add the missing multiplicative signes
> (like the 3 which has to multiplicate x^2 here)
>
> Now, the string "3*(x**2)" is a valid syntax for pstricks (up to
> replacement ** -> ^, which is trivial)
>
>
> Making some tests, I remarked the following :
>
>
> 13:45:19 ~ >$ sage
> ----------------------------------------------------------------------
> | SAGE Version 3.0.5, Release Date: 2008-07-11 |
> | Type notebook() for the GUI, and license() for information. |
> ----------------------------------------------------------------------
>
> sage: var('x')
> x
> sage: f(x)=x**3
> sage: f(x)
> x^3
> sage: print f(x)
>
> 3
> x
> sage:
>
>
> The output of f(x) is what I want to catch in a string (python).
>
> The following does not work, and I understand (more or less) why :
>
> s = "x**3"
> var('x')
> f = eval(s)
> t = f(x).replace("3","hello")
> print t
>
> The expected result was
> x^hello
> or
> x**hello
> or, better :
> x^(hello)
>
>
> Have a good day
> Laurent
>
>
> >
>
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