asyncio combined with thread pool

#Using multithreading: integrating blocking io in coroutines 
import asyncio
 from concurrent.futures import ThreadPoolExecutor
 import socket
 from urllib.parse import urlparse


def get_url(url):
     #Request html through socket 
    url = urlparse(url)
    host = url.netloc
    path = url.path
    if path == "":
        path = "/"

    #Establish a socket connection 
    client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
     # client.setblocking(False) 
    client.connect((host, 80)) #Blocking will not consume cpu

    #Keep asking if the connection is established, you need a while loop to keep checking the status 
    #Do a calculation task or initiate another connection request 

    client.send( " GET {} HTTP/1.1\r\nHost:{}\r \nConnection:close\r\n\r\n " .format(path, host).encode( " utf8 " ))

    data = b""
    while True:
        d = client.recv(1024)
        if d:
            data += d
        else:
            break

    data = data.decode("utf8")
    html_data = data.split("\r\n\r\n")[1]
    print(html_data)
    client.close()


if __name__ == "__main__":
    import time
    start_time = time.time()
    loop = asyncio.get_event_loop()
    executor = ThreadPoolExecutor(3)
    tasks = []
    for url in range(20):
        url = "http://shop.projectsedu.com/goods/{}/".format(url)
        task = loop.run_in_executor(executor, get_url, url)
        tasks.append(task)
    loop.run_until_complete(asyncio.wait(tasks))
    print("last time:{}".format(time.time()-start_time))