[Python-Dev] "buffer interface" messages

Nick Coghlan ncoghlan at gmail.com
Fri Dec 3 17:45:42 CET 2010

On Sat, Dec 4, 2010 at 2:28 AM, Antoine Pitrou <solipsis at pitrou.net> wrote:
> On Fri, 03 Dec 2010 10:11:29 -0500
> "R. David Murray" <rdmurray at bitdance.com> wrote:
>> >
>> > >>> 'abc'.transform('hex')
>> > TypeError: 'str' does not support the buffer interface
>> > >>> b'abc'.transform('rot13')
>> > TypeError: expected an object with the buffer interface
>> I find these 'buffer interface' error messages to be the most confusing
>> error message I get out of Python3 no matter what context they show up
>> in.  I have no idea what they are telling me.  That issue is more
>> general than transform/untransform, but perhaps it could be fixed
>> for transform/untransform in particular.
> I agree. "buffer interface" is a technicality that the Python user
> doesn't do about (unless (s)he also writes C extensions). How about
> "expected a bytes-compatible object"?

Why not "binary data interface"? That's what they're actually looking for.

It seems odd for 'rot13' to be throwing that error though.


Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia

More information about the Python-Dev mailing list