Python并发编程-协程实现socketserver

#server.py
from gevent import monkey;monkey.patch_all()
import socket
import gevent
sk = socket.socket()
sk.bind(('127.0.0.1',8080))
sk.listen()
def talk(conn):
    conn.send(b'hello')
    print(conn.recv(1024).decode('utf-8'))
    conn.close()
while True:
    conn,addr = sk.accept()
    gevent.spawn(talk,conn)
sk.close()
#client.py
import socket
sk =socket.socket()
sk.connect(('127.0.0.1',8080))
print(sk.recv(1024).decode('utf-8'))
msg = input('>>>'.encode('utf-8'))
sk.send(msg)
sk.close()