python socket.recv返回值 python socket connect返回值

应用socket,subprocess模块,实现客户端和服务端命令发送并返回结果的小程序,代码如下:

server.py程序
import socket,subprocess
sk = socket.socket()
address = ('127.0.0.1',8001)
sk.bind(address)
sk.listen(3)
conn,addr = sk.accept()
data = conn.recv(1024)
obj = subprocess.Popen(str(data,'utf8'),shell=True,stdout=subprocess.PIPE)
cmd_result = obj.stdout.read()
conn.sendall(cmd_result)
sk.close()

client.py程序
import socket
sk = socket.socket()
address = ('127.0.0.1',8001)
sk.connect(address)
data = input('>>>')
sk.send(bytes(data,'utf8'))
result = sk.recv(1024)
print(str(result,'utf8'))
sk.close()

client.py和server.py通信后在client.py端显示的结果如下:

/usr/bin/python3.6 /home/guoming/python/day26/cmd_client.py
>>>ls
chat_client.py
chat_server.py
client.py
cmd_client.py
cmd_server.py
server.py
test.py