[Tutor] please help with read_until, write script

[cindy chao]

Hi, all Python Experts,
I am a Python beginner.
I am trying to script the following steps.
I have problem to match the step after 'signature check?'
'[999.daisyse.07260019]:' the value of 0726009 is dynamic, every time it will 
be different, so I don't know how to do it. 
For sure I have problem to match 'directory and config file? (Yes/No) [Yes]:' 
and 'current configuration? (Yes/No) [Yes]:'
I use IDLE in pc to write and run the script.

Please help, thank you very much.

All the steps I want to script.

vyatta at Daisy-BGP1:~$ add sys image http://packages.vyatta.com/vyatta-dev/daisy-se/unstable/iso/livecd_2013-07-26-0018-7e824ac_i386.iso
Trying to fetch ISO file from http://packages.vyatta.com/vyatta-dev/daisy-se/unstable/iso/livecd_2013-07-26-0018-7e824ac_i386.iso
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  223M  100  223M    0     0  45.6M      0  0:00:04  0:00:04 --:--:-- 45.2M
ISO download succeeded.
Checking for digital signature file...
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
curl: (22) The requested URL returned error: 404
Unable to fetch digital signature file.
Do you want to continue without signature check? (yes/no) [yes] yes
Checking MD5 checksums of files on the ISO image...OK.
Done!
What would you like to name this image? [999.daisyse.07260019]:
OK.  This image will be named: 999.daisyse.07260019
Installing "999.daisyse.07260019" image.
Copying new release files...
Would you like to save the current configuration
directory and config file? (Yes/No) [Yes]: yes
Copying current configuration...
Would you like to save the SSH host keys from your
current configuration? (Yes/No) [Yes]: yes
Copying SSH keys...
Setting up grub configuration...
Done.

=====================================================
Here is my code.

session = telnetlib.Telnet("10.1.34.21", timeout=5)
...skip some write and read_until...
session.write('yes'+'\n')
h1=session.read_until('[999.daisyse.07260019]:')
print h1
session.write('\n')
        
#h20=session.read_until('(Yes/No) [Yes]:')- never match
#h20=session.read_until('[Yes]:') - never match
#h20=session.expect('(Yes/No)', '[Yes]:')- script just terminate
#h20=session.read_lazy('[Yes]:')-script just terminate
#h20=session.read_expect('.*\(Yes\/No\)')- script just terminate
h20=session.read_expect('.*\s\(Yes\/No\)')- script just terminate

print h20

=======================================================
#h20=session.read_until('(Yes/No) [Yes]:')- never match, just wait there, never finish.


OUtput from IDLE:

[Kvyatta at Daisy-BGP1:~$
 add sys image http://packages.vyatta.com/vyatta-dev/daisy-s 
e/unstable/iso/livecd_2013-07-26-0018-7e824ac_i386.iso 

Trying to fetch ISO file from http://packages.vyatta.com/vyatta-dev/daisy-se/unstable/iso/livecd_2013-07-26-0018-7e824ac_i386.iso

  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current

                                 Dload  Upload   Total   Spent    Left  Speed


  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
 34  223M   34 77.1M    0     0  87.1M      0  0:00:02 --:--:--  0:00:02 87.4M
 60  223M   60  135M    0     0  71.6M      0  0:00:03  0:00:01  0:00:02 71.8M
 69  223M   69  154M    0     0  53.4M      0  0:00:04  0:00:02  0:00:02 53.5M
 70  223M   70  156M    0     0  19.2M      0  0:00:11  0:00:08  0:00:03 19.2M
100  223M  100  223M    0     0  25.2M      0  0:00:08  0:00:08 --:--:-- 25.2M

ISO download succeeded.

Checking for digital signature file...

  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current

                                 Dload  Upload   Total   Spent    Left  Speed


  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0

curl: (22) The requested URL returned error: 404

Unable to fetch digital signature file.

Do you want to continue without signature check? (yes/no) [yes]
 yes

Checking MD5 checksums of files on the ISO image...OK.

Done!

What would you like to name this image? [999.daisyse.07260019]:


==========================================


#h20=session.expect('(Yes/No)', '[Yes]')- script just terminate

Do you want to continue without signature check? (yes/no) [yes]
 yes

Checking MD5 checksums of files on the ISO image...OK.

Done!

What would you like to name this image? [999.daisyse.07260019]:
>>> 

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