Python: DISTINCT on GQuery result set (GQL, GAE)

Question

Imagine you got an entity in the Google App Engine datastore, storing links for anonymous users. You would like to perform the following SQL query, which is not supported:<

Answer 1

One option would be to put the results into a set object:

http://www.python.org/doc/2.6/library/sets.html#sets.Set

The resulting set will consist only of the distinct values passed into it.

Failing that, building up a new list containing only the unique objects would work. Something like:

unique_results = []
for obj in user:
    if obj not in unique_results:
        unique_results.append(obj)

That for loop can be condensed into a list comprehension as well.