On Dec 11, 3:31 pm, Arnaud Delobelle <arno...@googlemail.com> wrote: > Robocop <btha...@physics.ucsd.edu> writes: > > I have a list of objects, each object having two relevant attributes: > > date and id. I'd like not only organize by id, but also by date. > > I.e. i would like to parse my list into smaller lists such that each > > new mini-list has a unique date, but consists of only objects with a > > specific id. Are there any handy imports i could use to accomplish > > something like this? I'm relatively new to python and as such don't > > know all of the preloaded functions at my disposal. Thanks for any > > help in advance, the community here is always ridiculously helpful. > > Look at itertools.groupby. > > E.g. > > from itertools import groupby > > data = [ my objects ] > > def getdate(x): return x.date > > by_date = {} > for date, objs in groupby(sorted(data, key=getdate), getdate): > by_date[date] = list(objs) > # list(objs) is the list of all objects in data whose date is date > > I'm sorry if this is a bit terse... > > -- > Arnaud
This looks to be exactly what i'm looking for! I will try and implement this immediately, thank you all for the suggestions. -- http://mail.python.org/mailman/listinfo/python-list