Finding items not in 2 lists/dictionaries

[Terry Reedy]

"Robin Siebler" <robin.siebler at palmsource.com> wrote in message
news:95c29a5e.0305011933.289d71ca at posting.google.com...
> On page 15 of the Python Cookbook, it shows how to find all of the
> common items in 2 dictionaries.  How would I find all of the items
> that are *not* in both dictionaries (or lists)?

More practical than previous reply (untested, it too late here):

out = dict(dict1)
for k,v in dict2:
  if k in out:
    del out[k]
  else:
     out[k] = v

Terrry J. Reedy