def count_tickets(self):
        return self.engine.execute(self.tickets.count()).fetchone()[0]
Locates mapreduce.yaml, loads and parses its info.
dataset/ETHPy150Open getlogbook/logbook/logbook/ticketing.py/SQLAlchemyBackend.count_tickets--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/ext/mapreduce/status.py/get_mapreduce_yaml