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

Sorry to dig this question up but in GAE I cannot compare objects like that, I must use .key() for comparison like that:

Beware, this is very inefficient :

def unique_result(array):
    urk={} #unique results with key
    for c in array:
        if c.key() not in urwk:
            urk[str(c.key())]=c
    return urk.values()

If anyone has a better solution, please share.