使用python脚本利用SSH协议通过TFTP备份华为交换机配置

前提工作
python中默认没有安装SSH模块，SSH功能依靠paramiko 模块实现，需要自己独立安装，具体安装步骤自行百度。
主要脚本，和之前一样，通过TFTP备份配置
#!/usr/bin/python
#-*- coding: utf-8 -*-
import re
import paramiko #引入ssh模块，该模块需要单独安装。
import time
LogTime = time.strftime('%Y-%m-%d_%H-%M-%S')
tftp = raw_input('Please Enter TFTP Sever IP:')
temp = open('config.txt','w')
hostname = '192.168.202.254'
port = 22
username = 'admin'
password = 'passw0rd'
client = paramiko.SSHClient()
client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
client.connect(hostname, port, username, password, timeout=5)
remote_conn = client.invoke_shell()
remote_conn.send('display version\n')
time.sleep(1)
remote_conn.send('\n')
out = remote_conn.recv(temp)
DeviceName = (re.findall(str(".*<(.*)>.*"),out))[0]
save = "save %s-%s.cfg " %(DeviceName,LogTime)
remote_conn.send(save+'\n')
time.sleep(1)
remote_conn.send('y'+'\n')
time.sleep(2)
tftp_cli = "tftp %s put %s-%s.cfg" %(tftp,DeviceName,LogTime)
remote_conn.send(tftp_cli+'\n')
time.sleep(2)
print hostname,'Backup Success !!'