This should be:
class MyPrinter(CCodePrinter):
def _print_Symbol(self, expr):
name = super(MyPrinter, self)._print_Symbol(expr)
return 'foo_' + name
Jason
moorepants.info
+01 530-601-9791
On Tue, Nov 3, 2015 at 8:01 PM, Jason Moore <moorepa...@gmail.com> wrote:
> 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 <rgbr...@gmail.com> 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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