[Python-Dev] The buffer() function

[Thomas Heller]

Fredrik Lundh schrieb:
> Thomas Heller wrote:
> 
>>>> Naturally I tried to call base64.encodestring(buffer(ctypes_instance))
>>>> and it worked, so that was my answer.
>  >>
>>> does ctypes_instance implement the buffer API ?  if it does, is the 
>>> buffer() call even necessary ?
>> 
>> Yes, in both cases.
> 
> are you sure?  does it implement the bf_getreadbuffer slot?  afaik, 
> afaicr, and from what I can tell by looking briefly at the sources, the 
> binascii.b2a_base64 function uses the the s# marker, and that argument 
> type accepts strings *and* read only buffers, right away.  no extra crud 
> should be necessary.

Yes, for binascii.b2a_base64 you are right: bf_getreadbuffer is sufficient.
For binascii.b2a_hex (for example), it is not sufficient.

But that was not the question.  What about the status of the buffer function?

All the above functions accept a buffer object.

Thomas