Test Tornado's periodic callback

test_periodic_callback.py

import time

import tornado.gen
import tornado.ioloop


class Counter:
    n = 0


@tornado.gen.coroutine
def consume(n):
    for i in range(1, 17):
        print('counter: {0}, number: {1}'.format(n, i))
        st = time.time()
        yield tornado.gen.sleep(1)
        # tornado.gen.sleep(1)
        et = time.time()
        # print('{0}'.format(et - st))
        if i == 1:
            print('first time: {0}'.format(st))
        elif i == 16:
            print('last time: {0}'.format(et))


def fn():
    st = time.time()
    print('start time: {0}'.format(st))
    n = Counter.n
    n = n + 1
    Counter.n = n
    consume(n)
    et = time.time()
    print('end time: {0}'.format(et))
    print('time consumed: {0}'.format(et - st))


if __name__ == '__main__':
    main_ioloop = tornado.ioloop.IOLoop.current()

    interval_ms = 10 * 1000  # 10 second
    scheduler = tornado.ioloop.PeriodicCallback(fn, interval_ms, io_loop=main_ioloop)
    scheduler.start()

    main_ioloop.start()