Bill Spotz wrote: > Hi, > > I am currently using PyArray_FromObject() to convert an input > argument to a 32-bit integer array. On a 64-bit architecture, it is > easy to create an integer array whose default type is 64-bit. When > this is sent to PyArray_FromObject(), it raises an error, saying > "array cannot be safely cast to required type", even though all of > its elements are representable by 32 bits. >
There is not a per-element check to casting. The casting is done with a C-level coercion which does not check for overflow. > How hard would it be to implement a new option (NPY_ATTEMPTCAST?) > that attempts to make the cast, but raises an OverflowError if any of > the source data is too large for the target array? (Or, > alternatively, make this the default behavior if NPY_FORCECAST is > false?) > This would be a big change because it would have to be implemented (as far as I can tell) with some kind of checked-casting loops at the C-level. So, it could be done, but it would be a fairly large effort (and would impact the size of numpy significantly, I think). -Travis _______________________________________________ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion
