[SciPy-dev] ctypes callbacks, changing signature

Robert Kern robert.kern@gmail....
Sat Mar 1 14:26:52 CST 2008

On Sat, Mar 1, 2008 at 2:20 PM, Gabriel Gellner <ggellner@uoguelph.ca> wrote:
> I am wrapping some ode solvers using ctypes. And I have run into, what I
>  imagine is, a common problem.
>  The expected C callback is of the form
>  void func(int n, double t, double* y, double* yprime);
>  which I can wrap fine using ctypes. But I would like to be able to use a
>  python (or f2py generated) function of the normal form
>  def func(t, y):
>     # some callculations
>     return yprime
>  # instead of
>  def func(n, t, y, prime):
>     return None
>  My question is what do people usually do in this case? Any tips suggestions,
>  examples.

Wrap it with a function of the required signature.

Robert Kern

"I have come to believe that the whole world is an enigma, a harmless
enigma that is made terrible by our own mad attempt to interpret it as
though it had an underlying truth."
  -- Umberto Eco

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