[Python-Dev] Assertion in _PyManagedBuffer_FromObject() (original) (raw)

Stefan Krah stefan at bytereef.org
Fri Mar 2 16:30:57 CET 2012

Stefan Behnel <stefan_ml at behnel.de> wrote:

I keep failing to see the interest in making this an error in the first place.

First, it is meant to guard against random pointers in the view.obj field, precisely because view.obj was undocumented and exporters might not fill in the field.

Then, as I said, the exporter is exposed on the Python level now:

exporter = b'123' x = memoryview(exporter) x.obj == exporter True x.obj b'123'

Why would the object that bfgetbuffer() is being called on have to be identical with the one that exports the buffer?

It doesn't have to be. This is now possible:

from testbuffer import * exporter = b'123' nd = ndarray(exporter) m = memoryview(nd) nd.obj b'123' m.obj <ndarray object at 0x7fbef33677d8>

Stefan Krah

More information about the Python-Dev mailing list