23.协程的使用场景,高I/O密集型程序

import time

def one_hundred_millionA():

    start_time = time.time()

    i = 0
    for _ in range(100000000):
        i = i +1
        yield
    end_time = time.time()

    print("A--Total time:{}".format(end_time-start_time))

def one_hundred_millionB(a):

    start_time = time.time()

    i = 0
    for _ in range(100000000):
        i = i +1
        a.__next__()
    end_time = time.time()

    print("B--Total time:{}".format(end_time-start_time))

if __name__ == '__main__':
    a = one_hundred_millionA()
    one_hundred_millionB(a)

    #实现开发中协程往往用在高IO密集型的程序,对于高CPU密集型效果不明显