Standard graph API?

[Steven Bethard]

Magnus Lie Hetland <mlh <at> furu.idi.ntnu.no> writes:
> Is there any interest in a (hypothetical) standard graph API (with
> 'graph' meaning a network, consisting of nodes and edges)?

I don't need one right now, but I know I have a few times in the past.  
Certainly seems like a good idea to me.  We've got sets as builtins now, no 
reason we shouldn't have a simple graph API, at least in the library.

Steve