Python pexpect问题

Question

好的，我正在尝试编写一个脚本来保存我的网络设备上的配置。我在某个地方出错了，我不知道在哪里。它不会发送最终确认“y”字符，但我认为这是由于我所说的预期。

当前代码：

tabstop=2

我也试过这行产生了同样的结果：

import pexpect
import sys
import os
import time
import getpass

hostname = "switch1"
username = raw_input('Enter Your username: ')
password = getpass.getpass('Password:')
fout = file('mylog.txt','w')

child = pexpect.spawn('ssh %s@%s' % (username, hostname))
child.logfile_read = fout
child.expect('myusername@%s\'s password:' % hostname)
child.sendline(password)
child.expect('>')
child.sendline('enable')
child.expect('Password:')
child.sendline(password)
child.expect('#')
child.sendline('wr mem')
child.expect("Are you sure you want to save? (y/n) ")
child.sendline('y')
child.expect('#')
child.sendline('logout')

以下是我的开关上的样子：

child.expect("\r\n\r\nThis operation may take a few minutes.\r\nManagement interfaces will not be available during this time.\r\n\r\nAre you sure you want to save? (y/n) ")

这是我运行脚本时遇到的错误：

(switch1) #write mem

This operation may take a few minutes.
Management interfaces will not be available during this time.

Are you sure you want to save? (y/n) y

Config file 'startup-config' created successfully .


Configuration Saved!

(switch1) #

我再次认为它与期望有关“你确定要保存”但是我不确定。我可以确认登录到交换机和其他命令工作，因为我有其他脚本，这只是我无法弄清楚的。任何帮助表示赞赏。

Answer 1

检查日志：

searcher: searcher_re: 0: re.compile("Are you sure you want to save? (y/n) ")

将"Are you sure you want to save? (y/n) "编译为正则表达式会将?, (, / and )作为特殊字符进行编译，因此请尝试将它们视为这样：

"Are you sure you want to save\? \(y\/n\) "与文字"Are you sure you want to save? (y/n) "匹配this

因此请将此行更改为：

child.expect("Are you sure you want to save\? \(y\/n\) ")

Answer 2

Pexpect还支持部分匹配。所以你也可以使用，

child.expect('Are you sure you want to save?')