def run():
earliest = date.today() - timedelta(days=3)
purgable = Change.query(Change.purgeable_since != None,
Change.purgeable_since < earliest)
purgable.map(lambda i: i.key.delete())
def run():
earliest = date.today() - timedelta(days=7)
purgable = Change.query(Change.for_date < earliest)
purgable.map(lambda i: i.key.delete())
