Sturla Molden <sturla@...> writes: > > On 27.02.2013 20:05, Dave Hirschfeld wrote: > > > Is this a required restriction? Is there any workaround? > > http://www.python.org/dev/peps/pep-3118/ > > What you should consider is the "readonly" field in "struct bufferinfo" > or the access flag "PyBUF_WRITEABLE". > > In short: > > A PEP3118 buffer can be readonly, and then you shouldn't write to it! > When you set the readonly flag, Cython cannot retrieve the buffer with > PyBUF_WRITEABLE. Thus, Cython helps you not to shoot yourself in the > foot. I don't think you can declare a read-only memoryview in Cython. > (Well, not by any means I know of.) > > Sturla > >
So the issue is that at present memoryviews can't be readonly? Presumably because this works for numpy arrays it would be possible to also make readonly memoryviews? I think that would certainly be nice to have, but maybe it's a niche use case. Certainly, for IPython.parallel use it's easy enough to write a shim which sets the array to writeable with the understanding that changes don't get propagated back. Thanks, Dave _______________________________________________ cython-devel mailing list cython-devel@python.org http://mail.python.org/mailman/listinfo/cython-devel
