python多进程登录远端服务器

#/usr/bin/python
# _*_ coding: utf-8 _*_
import multiprocessing
import time
import paramiko
def ssh(s,i,host):

s.acquire()
print(time.strftime('%H:%M:%S'),multiprocessing.current_process().name + " 获得锁运行");
ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect(hostname=host, port=22, username="root", password="yankefei")
print (host+" is login success")
stdin, stdout, stderr = ssh.exec_command("echo 
d
a
t
e
 && df -hl")
print(stdout.read().decode('utf-8'))
returncode = stdout.channel.recv_exit_status()
print("returncode:",returncode)

ssh.close()
# time.sleep(i)
print(time.strftime('%H:%M:%S'),multiprocessing.current_process().name + " 释放锁结束");
s.release()
print (host+" is unreachable")

ssh.close()
s.release()
if __name__ == "__main__":
s = multiprocessing.Semaphore(200) #同时并发200个进程
for n in range(111):
p = multiprocessing.Process(target = ssh, args=(s,2,"192.168.0."+str(n)))
p.start()