Pexpect if else statement

Question

I am trying to create a script which clears ciscoasa bad xlate.

To check bad xlate I run sh xlate | in 500 and if it gets a reply then it should send a clear command. If I don't do it, ciscoasa won't allow new vpn tunnels.

I need help with the if else statement. Otherwise, the script is working fine. Here is my code:

import pexpect
import re

password1="abc"
password2="abc"
router="127.0.0.20"
user="user"


#Extracting IP out of xlate command
class sendip(object):
    def ip(self,reply):
    divide=reply[15:32]
    extract_ip = re.findall( r'[0-9]+(?:\.[0-9]+){3}', divide )
    for ip in extract_ip:
      send = 'clear local-host '+ip
      return send
clearVPN = sendip()

#ssh into ciscoasa userop5@ip
child = pexpect.spawn ('ssh ' + user + '@' + router)
child.expect ('.*assword:.*')
child.sendline (password1)

#enable mode
child.expect ('.*>.*')
child.sendline ('ena')
child.expect ('.*assword:.*')
child.sendline (password2)

# after enabling send test command
child.sendline ('terminal pager 0')
child.sendline ('show run | include http')
child.expect ('enroll*')
print child.before

# Here it sends command
child.sendline('sh xlate | i 500')
child.expect ('ciscoasa#.*')
print child.after

if child==1:  # If receive reply then extract IP and send clear memory
    child.expect('UDP.*')
    message = child.before
    child.sendline(clearVPN.ip(message)) #extract ip from there reply and send clear
    print child.before
    child.expect('clearing.*')
    print child.before
else:         # Otherwise memory is not full
    child.expect ('ciscoasa#.*')
    print 'Memory is empty'
    print child.after

child.sendline('exit')
child.close() # close ssh

score 1 · Answer 1 · answered Feb 22 '12 at 12:00

I'd say that what you need is use multiple patterns in the call to child.expect before the if statement. This way you'll be able to make a decision based on the response output to the last command send to the terminal.

For more information please have look at the lists if patterns section in the documentation.

Pexpect if else statement

1 Answers1