UnboundLocalError returned by pyATS parser for NXOS command

[musa-ktk]

I have NX-OS 9.3(7) (in EVE-NG) device to whcih pyATS can connect and parse all commands except thsi one command:
show bgp vrf all all neighbors

This command returns follwoing error:

Issue with the parser show bgp vrf all all neighbors

Traceback (most recent call last):
File "src/genie/cli/commands/parser.py", line 339, in genie.cli.commands.parser.ParserCommand.parse
File "src/genie/conf/base/device.py", line 531, in genie.conf.base.device.Device.parse
File "src/genie/conf/base/device.py", line 570, in genie.conf.base.device.Device._get_parser_output
File "src/genie/conf/base/device.py", line 568, in genie.conf.base.device.Device._get_parser_output
File "src/genie/metaparser/_metaparser.py", line 308, in genie.metaparser._metaparser.MetaParser.parse
File "/usr/local/lib/python3.10/dist-packages/genie/libs/parser/nxos/show_bgp.py", line 2971, in cli
[address_family]['session_state'] = session_state.lower()
UnboundLocalError: local variable 'session_state' referenced before assignment


This only happnes on this partiuclar commandon this paritucla deivce, I have exact same image on seprate node (in EVE-NG) and it works fine on that node. What could be the issue here?

[Alex Stevenson]

@musa-ktk,

Please see this external blog post about someone having an error from the same command, and notice the comment with a link to the documentation about Writing your own pyATS parser:

https://issueantenna.com/repo/CiscoTestAutomation/genieparser/issues/700

I hope thus helps!

[carlhyde]

The "UnboundLocalError: local variable referenced before assignment" error occurs in Python when you try to access a local variable before it has been assigned a value. This is typically caused by a typo, or by using the same name for a local variable and a global variable in the same scope or when you forget to assign a value to a local variable before using it.

x = x + 1
print(x) // This code will result in the error

to solve this....

x = 0 //assign a value to the local variable
x = x + 1
print(x)

To resolve the "UnboundLocalError: local variable referenced before assignment" error, you need to assign a value to the local variable before you use it. Another way to resolve this error is to use the global keyword to access the global variable with the same name.