shopping_cart.py 文件源码

def iterate_over_query_results_in_tasklet(Model, is_the_entity_i_want):
    qry = Model.query()
    qit = qry.iter()
    while (yield qit.has_next_async()):
        entity = qit.next()
        # Do something with entity
        if is_the_entity_i_want(entity):
            raise ndb.Return(entity)