import paramikoimport sysuser = "root"pwd = "123456"# 上传文件def sftp_upload_file(server_path, local_path):    try:        t = paramiko.Transport((ip, 22))        t.connect(username=user, password=pwd)        sftp = paramiko.SFTPClient.from_transport(t)        sftp.put(local_path, server_path)        t.close()    except Exception as  e:        print(e)# 下载文件def sftp_down_file(server_path, local_path):    try:        t = paramiko.Transport((ip, 22))        t.connect(username=user, password=pwd)        sftp = paramiko.SFTPClient.from_transport(t)        sftp.get(server_path, local_path)        t.close()    except Exception as e:        print(e)# 连接def ssh_conn(ip, cmd):    ssh = paramiko.SSHClient()    # 允许连接不在known_hosts文件上的主机    ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())    # 连接服务器    ssh.connect(ip, 22, user, pwd)    # 执行命令    stdin, stdout, stderr = ssh.exec_command(cmd)    # 获取结果    print(10 * "-", 'start', 10 * "-")    for line in stdout:        res=(line.strip('\n').split())        print(res)    else:        print(stdout)    print(10 * "-", 'end', 10 * "-")def menu():    print('''    * - - - - - - - - - - - - - - - - - *                        菜单                                     1>上传文件                                 2>下载文件                3>执行命令                4>退出    * - - - - - - - - - - - - - - - - - *    ''')    choice = int(input('请输入你要执行的操作：\n'))    if choice == 1:        src = input('请输入原路径：\n')        dest = input('请输入目标路径：\n')        sftp_upload_file(src, dest)    elif choice == 2:        src = input('请输入原路径：\n')        dest = input('请输入目标路径：\n')        sftp_down_file(src, dest)    elif choice == 3:        while True:            cmd = input('请输入要执行的命令：\n')            if cmd == 'eixt':                sys.exit()            ssh_conn(ip, cmd)    else:        sys.exit()if __name__ == '__main__':    ip = input('请输入目标ip：\n')    while True:        menu()