On Tue, Sep 22, 2015 at 6:55 PM, Chris Angelico <ros...@gmail.com> wrote: > On Wed, Sep 23, 2015 at 8:42 AM, Larry Martell <larry.mart...@gmail.com> > wrote: >> I currently have 3 lists of lists and I sort them based on a common >> field into a single list like this: >> >> def GetObjKey(a): >> return a[2] >> >> sorted(a + b + c, key=GetObjKey) >> >> Which works just fine. >> >> But now, I need to have just the first list (a) also sub sorted by >> another field and I can't quite figure out how to do this. > > Have you tried simply sorting a by the other field prior to doing your > merge-and-sort? The Python list.sort() method is guaranteed to be > stable. I can't find a comparable guarantee for sorted(), but worst > case, you should be able to do your list merge, and then explicitly > name it and sort it.
Thanks to everyone for the replied. I ended up just presorting he first list, then merging and sorting all 3. Very simple. Not sure why I didn't see that. Probably comes from working 75 hours/week. -- https://mail.python.org/mailman/listinfo/python-list