On Sat, 21 Apr 2007 20:13:44 -0700, Prateek wrote: > I have a bit of a specialized request. > > I'm reading a table of strings (specifically fixed length 36 char > uuids generated via uuid.uuid4() in the standard library) from a file > and creating a set out of it. > Then my program is free to make whatever modifications to this set. > > When I go back to save this set, I'd like to be able to only save the > new items.
This may be a silly question, but why? Why not just save the modified set, new items and old, and not mess about with complicated transactions? After all, you say: > PS: Yes - I need blazing fast performance - simply pickling/unpickling > won't do. Memory constraints are important but definitely secondary. > Disk space constraints are not very important. Since disk space is not important, I think that you shouldn't care that you're duplicating the original items. (Although maybe I'm missing something.) Perhaps what you should be thinking about is writing a custom pickle-like module optimized for reading/writing sets quickly. -- Steven. -- http://mail.python.org/mailman/listinfo/python-list
