head for grouped data - looking for best practice

[Harald Massa]

Steve,


> Why don't you just pass a slice to itemgetter?
py> for key, bereich in groupby(eingabe, itemgetter(slice(0, 2))):


WHOW, that is great! that makes it really simple, just have to structure 
the SQL to make a real "cut first, serve first" structure.

Thanks to all who helped!

also the "function factory function" bei Dietz was very helpfull; and 
Peters classes looked really impressive!

Thanks again... now my code will be even clearer.

Harald