def end():
    print prunner.get_dict()['sum']
def sum_up(n):
    with prunner.global_lock():
        prunner.get_dict()['sum'] += n
def begin():
    prunner.get_dict()['sum'] = 0
    prunner.post_task(init, range(2000))
def end():
    print prunner.get_dict()['sum']
def sum_up(n):
    with prunner.global_lock():
        prunner.get_dict()['sum'] += n
def begin():
    prunner.get_dict()['sum'] = 0
    prunner.post_task(init, range(2000))