CLI output parsing
TextFSM
Lots of ready templates for parsing network related CLI:
https://github.com/networktocode/ntc-templates/blob/master/ntc_templates/templates
https://pypi.org/project/textfsm/
https://pyneng.readthedocs.io/en/latest/book/21_textfsm/textfsm_examples.html
Template Text Parser (TTP)
https://github.com/dmulyalin/ttp
Cisco's Genie Parser
Contains lots of ready parsers for common CLIs
Dictionary Query:
https://pubhub.devnetcloud.com/media/genie-docs/docs/userguide/utils/index.html#dq