Error using regex branch reset group within command_parser pattern_match about network-engine

[blandrew]

@mattgmoser pattern_match uses the re regular expression module from the Python standard library, which doesn't appear to support branch reset groups.

If your real world use case is as simple as the example provided above, putting the OR logic within the same capture group may suffice:

>>> re.search("(doggies|Cisco Nexus Operating)", 'some text with doggies').group(1)
'doggies'
>>> re.search("(doggies|Cisco Nexus Operating)", 'Cisco Nexus Operating System').group(1)
'Cisco Nexus Operating'

[mattgmoser]

Thank you @blandrew , I was wondering if that was the case. I've been able to find a successful work-around, I appreciate your looking into this.

[trishnaguha]

Python re doesn't support branch reset which command_parser uses.
3rd party PyPi regex module supports a branch reset feature.
Hence command_parser is failing.
Please file a bug report if you face issue further. Thanks!