Network programming-socket realizes cyclic communication

server

import socket
phone = socket.socket (socket.AF_INET, socket.SOCK_STREAM)
phone.bind(('127.0.0.1',8080))
phone.listen(5)
conn,client_addr=phone.accept()
print(client_addr)
#通信循环
while True:
    data=conn.recv(1024)
    print("Client data:",data)
    conn.send(data.upper())
conn.close()

 

client

import socket
client = socket.socket (socket.AF_INET, socket.SOCK_STREAM)
client.connect(( ' 127.0.0.1 ' ,8080 ))
 #communication loop 
while True:
    msg=input('>> ').strip()
    client.send(msg.encode('utf-8'))
    data =client.recv(1024 )
     print (data)
 #Close the connection 
client.close()