I'm playing with the matrix example.
cdef extern from "numpy/arrayobject.h":
ctypedef int intp
ctypedef extern class numpy.ndarray [object PyArrayObject]:
cdef char *data
cdef int nd
cdef intp *dimensions
cdef intp *strides
cdef int flags
def mysum(ndarray a):
cdef double *p = <double *>a.data
cdef int dim = a.dimensions[0]
cdef double s=0
for i from 0 <= i < dim:
s += p[i]
p[0] = 13.
return s
/usr/lib64/python2.5/site-packages/numpy/core/include/numpy/__multiarray_api.h:948:
warning: 'int _import_array()' defined but not used
This is going to segfault. In python module init, it must
say 'import_array();'
How do I cause this to get added to the C module init?
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