Comment 1 for bug 829032

Perhaps I've misunderstood the point of it. I do stuff like this:

keys = ["field1", "field2"]
dg = DictionaryGrid(keys=keys)

and then I do:

dicts = dg.get_dictionaries_copy().

This returns an empty list when dictionaries haven't been
set. I think this is confusing. If you've told it which keys to
use, but not added any dictionaries, then I think it should
return a list of dictionaries using the provided keys.