Suggesting a new feature - "Inverse Generators"

Scott David Daniels wrote:
> Michael Spencer wrote:> >> itertools.groupby enables you to do this, you just need to define a >> suitable grouping function, that stores its state:> > > Michael, this would make a great Python Cookbook Recipe.> 
OK, will do.  What would you call it?  Something like: "Stateful grouping of 
iterable items"

[Bengt]:
> Nice, but I think "record" is a bit opaque semantically.> How about group_id or generate_incrementing_unique_id_for_each_group_to_group_by or such?> > Regards,> Bengt Richter

Agreed, it's an issue.  I think the most natural name is groupby - but that 
would cause more trouble.  What do you think about 'grouping' ?
I would use 'generate_incrementing_unique_id_for_each_group_to_group_by', but 
then people might think I'm trying to outdo Bob Ippolito :-)

[Serge]:
> I think your example would> be more clear for Jordan if you used function attributes:> > def record(item):>      if len(item) > 20:>          record.seq +=1>      return record.seq> record.seq = 0

That does read better than the mutable default argument hack.  Is this use of 
function attributes generally encouraged? (I tend to think of func_dict for 
meta-data, used only outside the function)  Thoughts?

Michael