Re: [Pyobjc-dev] pickled Objective-C objects

[<bb...@ma...>]

On Monday, Feb 24, 2003, at 13:29 US/Eastern, Just van Rossum wrote:
> Is objc._convenience the right place for this? I guess not since it
> currently doesn't even import Foundation.

Maybe, maybe not.   Likely, the correct approach would be to test the 
object to see if it responds to the NSCoding protocol.  If it does, 
then NSArchiver/NSUnarchiver can be used to archive/unarchive instances 
of the class and, hence, the class is pickle compatible.

> PS: It seems NSData doesn't support the buffer protocol; you can't pass
> a string where an NSData is expected, and str(anNSDataInstance) doesn't
> do the right thing.

Can the buffer protocol be implemented entirely on the Python side of 
the bridge?   Is so, it should be easy to support?

If not, then the ObjC->Python proxy would have to be extended to offer 
buffer protocol features *only* if appropriate.  Given the way this is 
implemented, I believe the implication is that we would need to 
effectively create a second proxy class [python C-API type class] that 
contains non-NULL entries for the buffer protocol support?

b.bum