def request_pairing(num_rounds=10, cutoff=95, exclude=None):
q = Pairing.all()
q = q.filter_by(decided=False)
if exclude is not None:
q = q.filter(~Pairing.id.in_(exclude))
q = q.order_by(Pairing.score.desc())
next_ = q.first()
if next_ is not None:
return next_
next_ = generate_best_random_pairing(num_rounds=num_rounds,
cutoff=cutoff)
generate_pairings.delay()
return next_
