On Wed, 27 Dec 2017 14:19:16 +0000 Jonathan Underwood <jonathan.underw...@gmail.com> wrote: > Hello, > > I am not sure if this is expected behaviour, or a bug. > > In a C extension module, if I create and return an empty bytes object like > this: > > val = PyBytes_FromStringAndSize (NULL, 20); > Py_SIZE(val) = 0;
I wouldn't call it "expected", but bytes objects are supposed to be NULL-terminated internally, so your code technically creates an invalid bytes object. The NULL-terminated constraint may be relied on by some code, for example when the string gets passed to a third-party C function. Perhaps that should be mentioned in the C API docs. Regards Antoine. _______________________________________________ Python-Dev mailing list Python-Dev@python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
