Serhiy Storchaka <storchaka at gmail.com> wrote: > 4. The consumer has NOT requested writable buffer, can readonly flag > of provided buffer be false anyway? Yes, per the new documentation. This is not explicitly mentioned in the PEP but was existing practice and greatly simplifies several things: http://docs.python.org/dev/c-api/buffer.html#PyBUF_WRITABLE Stefan Krah