python 多线程执行命令

# !/usr/bin/env python
import paramiko
import threading
import time


def commands(hostname, ip, username, passwd, cmd):
    try:
        ssh = paramiko.SSHClient()
        ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
        ssh.connect(ip, 22, username, passwd, timeout=5)
        # ssh.connect(ip,22,username,passwd)
        for m in cmd:
            stdin, stdout, stderr = ssh.exec_command(m)
            out = stdout.readlines()
            for o in out:
                print('主机%s执行结果%s' % (hostname, o)),
                #return '主机%s执行结果%s' % (hostname, o)
        print('%s\tOK\n' % (hostname))
        ssh.close()
    except Exception as e:
        print('%s\tError\n %s时间：%s' % (hostname, e, time.strftime("%Y-%m-%d %H:%M:%S")))


if __name__ == '__main__':
    # cmd = ['mysql -e "use suhua; create table names(id int,name char(11))"','echo $?']
    cmd = ['yum -y install redis', 'echo $?']
    hostname = 'c2.com'
    username = "root"
    passwd = "Aa123456"
    threads = []
    print("Begin......")
    # for i in range(1,10):
    #     print(i)
    #     ip = '192.168.1.10'+str(i)
    #     a=threading.Thread(target=commands,args=(hostname,ip,username,passwd,cmd))
    #     a.start()
    host_list = ['192.168.1.105', '192.168.1.106']
    for ip in host_list:
        print(ip)
        a = threading.Thread(target=commands, args=(hostname, ip, username, passwd, cmd))
        a.start()