远程登录服务器执行cmd的Python脚本

import paramiko,os,sys

ip = raw_input("input ip address :>>>")
password = raw_input("input password:>>>")
cmd = raw_input("input your cmd:>>> ")

print '''
------connecting to %s ,--------
'''%ip
def ssh_cmd(ip,port,cmd,user,passwd):
    result = ""
    try:
        ssh = paramiko.SSHClient()
        ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
        ssh.connect(ip,port,user,passwd)
        stdin, stdout, stderr = ssh.exec_command(cmd)
        result = stdout.read()
        print result
        ssh.close()
    except:
        print "ssh_cmd err."
    return result