How about something like this:
In [1]: from sympy.abc import a, b, c
In [2]: from sympy.printing.ccode import CCodePrinter
In [3]: class MyPrinter(CCodePrinter):
def _print_Symbol(self, expr):
name = super(CCodePrinter, self)._print_Symbol(expr)
return 'foo_' + name
...:
In [4]: MyPrinter().doprint(a)
Out[4]: 'foo_a'
Jason
moorepants.info
+01 530-601-9791
On Tue, Nov 3, 2015 at 3:01 PM, Richard Brown <[email protected]> wrote:
> Hi there
>
> I'm a relative python/sympy newbie, and I need a little help on a problem.
> I'm writing a piece of code that translates a system of differential
> equations into either C, Python, or MATLAB/Octave code that can be
> interfaced to solvers in those languages. The models are specified using
> .ini files, and I'm using sympy's code generators to translate the model
> equations (which are in python syntax). So far so good.
>
> What I want to be able to do, is take an expression like
>
> prefix = 'foo'
> str = 'x**2 - sin(x) + exp(xy)'
>
> and turn it into C (or MATLAB) like
>
> 'pow(foo_x, 2) - sin(foo_x) + exp(foo_x * foo_y)'
>
> I know this involves overriding the printing library somehow, but I'm
> getting confused with where to start. Should I be overriding the __str__
> method of atom?
>
> Any help would be gratefully accepted
>
> Richard
>
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