Learn to write your own RegEx Parser Part 3/9:Cisco Show command parser Python RegEx Tutorial
#PythonRegex #CiscoParser #RegexTutorial
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This video demonstrates how to parse Cisco configuration using Parser in python
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Regular expression for Cisco show command
How to parse hostname, serial number uptime of Cisco devices from show version command output
Python re library tutorial
Script
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import re
version_pattern = re.compile(r'Cisco .+ Software, Version (\S+)\n')
model_pattern = re.compile(r'cisco (\S+).+bytes of memory\.')
serial_no_pattern = re.compile(r'Processor board ID (\S+)')
uptime_pattern = re.compile(r'(.+) uptime is (.*)')
with open('01_show_version_output.txt', 'r') as file:
output = file.read()
version_match = version_pattern.search(output)
print('IOS Version'.ljust(18)+': '+version_match.group(1))
model_match = model_pattern.search(output)
print('Model '.ljust(18)+': '+model_match.group(1))
serial_no_match = serial_no_pattern.search(output)
print('Serial Number '.ljust(18)+': '+serial_no_match.group(1))
uptime_match = uptime_pattern.search(output)
print('Host Name '.ljust(18)+': '+uptime_match.group(1))
print('Device Uptime '.ljust(18)+': '+uptime_match.group(2))
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