请教一个关于python socket的问题

#!/usr/bin/python

from socket import socket, AF_INET, SOCK_STREAM
from threading import Thread

port = 50008
host = 'localhost'

def server():
sock = socket(AF_INET, SOCK_STREAM)
sock.bind(('', port))
sock.listen(5)
while True:
conn, addr = sock.accept()
data = conn.recv(1024)
reply = 'server got: [%s]' % data
conn.send(reply.encode())

def client(name):
sock = socket(AF_INET, SOCK_STREAM)
sock.connect((host, port))
sock.send(name.encode())
reply = sock.recv(1024)
sock.close()
print('client got: [%s]' % reply)

if __name__ == '__main__':

sthread = Thread(target=server)
sthread.daemon = True
sthread.start()
for i in range(5):
Thread(target=client, args=('client%s' % i,)).start()