python使用urllib测试网络的连通性（判断网络是否可用）

from urllib import request
import time


def check_net(testserver):
    try:
        ret = request.urlopen(url=testserver, timeout=3.0)
        # print(ret)
    except:
        return False
    return True


t1 = time.time()
print(check_net('https://www.baidu.com'))
t2 = time.time()
print('check_net spend time', t2 - t1)