客户端代码（client.py）
import socket
client = socket.socket()
client.connect(('localhost',8080))
while True:
data = input('>>>')
client.send(data.encode('utf-8'))#data必须为字节序列
data = client.recv(1024).decode()
print('>>>',data)
client.close()
服务端代码（server.py）
import socket
server = socket.socket()
server.bind(('localhost',8080))
server.listen()
while True:
conn,addr = server.accept()
while True:
data = conn.recv(1024)
if not data:
print('the client is lost!!!')
break
print('>>>',data.decode())
data = input('>>>').encode('utf-8')
conn.send(data.encode('utf-8'))
server.close()
