paramiko之ssh用法

import threading
import paramiko
import subprocess

def ssh_command(ip,user,passwd,command):
    client=paramiko.SSHClient()
    #client.load_host_keys("filename")使用密钥验证
    #设置自动添加和保存ssh服务器的ssh密钥
    client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
    client.connect(ip,username=user,password=passwd)
    ssh_session=client.get_transport().open_session()
    if ssh_session.active:
        #调用ssh_comand函数运行command
        ssh_session.exec_command(command)
        a=ssh_session.recv(1024)
    return a
a=ssh_command("192.168.6.128",‘root‘,‘123456‘,‘ls -lh‘)
print(a.decode("gbk"))