折腾了一天的装饰器，貌似理解了其中的一点点．．．

#!/usr/bin/env python3
#coding=utf-8
import getpass
from netmiko import ConnectHandler
from netmiko.ssh_exception import NetMikoTimeoutException,NetMikoAuthenticationExceptiondef auth(Conn):def wrapper(ip,username,password):device = {'device_type': 'cisco_ios','ip': ip,'username': username,'password': password,}try:connect = ConnectHandler(**device)connect.enable()except (EOFError, NetMikoTimeoutException):print(u" 网络设备%s:  无法连接!请确认该设备IPAddress是否可达！"%ip)  returnexcept (EOFError, NetMikoAuthenticationException):print(u" 网络设备%s:  用户名与密码错误!请确认账号与密码！" %ip)returnConn(ip,username,password,connect)    return Connreturn wrapper@auth
def showInterface(ip,username,password,connect):res = connect.send_command('show ip int brief')print(res)connect.disconnect()@auth
def showVersion(ip,username,password,connect):res = connect.send_command('show version')print(res)connect.disconnect()def main():print(u"选项请输入数字，如: 1、2")print(u"1. 查询设备接口信息")print(u"2. 查询设备版本信息")print("")runFunc = int(input(u'请输入需要执行命令的选项: '))input_ip   = input("IPAddress: ")ipaddress  = input_ip.split(",")username = input("Username: ")password = getpass.getpass()for ip in ipaddress:if runFunc == 1:    showInterface(ip,username,password)if runFunc == 2:showVersion(ip,username,password)if __name__ == '__main__':main()

运执行上面的代码，运行效果如下：　

以下代码用类也可以实现相一样的结果，可以对比一下那个方便

#!/usr/bin/env python3
#coding=utf-8
import getpass
from netmiko import ConnectHandler
from netmiko.ssh_exception import NetMikoTimeoutException,NetMikoAuthenticationExceptionclass NWBackup():def __init__(self):self.ip       = input('IPAddress:')self.username = input('Username:')self.password = getpass.getpass()self.device={'device_type': 'cisco_ios','username': self.username,'password': self.password,'ip':self.ip}try:self.connect = ConnectHandler(**self.device)self.connect.enable()except (EOFError, NetMikoTimeoutException):print(u" 网络设备%s:  无法连接!请确认该设备IPAddress是否可达！" %self.ip) returnexcept (EOFError, NetMikoAuthenticationException):sprint(u" 网络设备%s:  用户名与密码错误!请确认账号与密码！" %self.ip)returndef disVersion(self):cmd = 'show version'print(self.connect.send_command(cmd))self.connect.disconnect()def disInterface(self):cmd = 'show ip interface brief'print(self.connect.send_command(cmd))self.connect.disconnect()def runComment(self):disfunc = int(input('pls input num: '))if disfunc == 1:self.disVersion()if disfunc == 2:self.disInterface()if __name__ == '__main__':run = NWBackup()run.runComment()