I have been working on my first C extension, using NumPy arrays, and have run into a problem. I have a very mysterious set of bugs, that result in a segmentation fault and core dump. Frankly it's still mysterious, but at the moment the problem seems to be that I have passed in a list of tuples, rather than a list of PyArrayObjects. I don't expect this to work, but when I put a : site = PyList_GetItem(spam_list, index); if (! PyArray_Check(spam)) result = 0; I shouldn't get a crash!! (and it does crash at this line, as near as I can tell) Isn't that exactly what PyArray_Check is for?? Note: with: spam = PyList_GetItem(spam_list, index); I get a "warning: assignment from incompatible pointer type " which goes away if I typecast it: spam = (PyArrayObject *) PyList_GetItem(spam_list, index); Should I be doing this, and should PyArray_Check(spam) work either way? I'm using Redhat Linux 6.1, Python 1.5.2, and python-numpy-1.11-2.i386.rpm Also: is there a compelling reason to upgrade either Python of NumPy, from the NumPy perspective? How are NumPy and 2.0 working together? Thanks, -Chris -- Christopher Barker, Ph.D. cbarker@jps.net --- --- --- http://www.jps.net/cbarker -----@@ -----@@ -----@@ ------@@@ ------@@@ ------@@@ Water Resources Engineering ------ @ ------ @ ------ @ Coastal and Fluvial Hydrodynamics ------- --------- -------- ------------------------------------------------------------------------ ------------------------------------------------------------------------