Brett Calcott wrote:
> Hi,
>
> I am very happy with the cython based extensions I have written to
> operate on numpy arrays. I'd like to refactor some code that is in these
> functions, putting it into a common cdef function that they can each
> call. Something like this:
>
> cdef common_stuff(np.ndarray[double, ndim=2] elements):
> # Tight loop here
> ...
>
> def fun1(np.ndarray[double, ndim=2] elements):
> # Do something
> ...
> common_stuff(elements)
>
> def fun2(np.ndarray[double, ndim=2] elements):
> # Do something different
> ...
> common_stuff(elements)
>
>
> But I get an error on compilation, that the parser "Expected ']'" where
> ndim is defined.
>
> What is the right way to do this?
You can't. You have to do
cdef func(elements_)
cdef np.ndarray[double, ndim=2] elements = elements_
and there's a certain overhead.
This will likely be fixed during summer.
http://trac.cython.org/cython_trac/ticket/177
--
Dag Sverre
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