The 
Try linting example.py with pylint, pylama and reformat it with black.
pip install -r requirements.txt
pylint example.py
pylama example.py
black --check --diff example.py
For YAML, first lint playbook.yml with yamllint.
yamllint playbook.yml
playbook.yml
1:1 error too many blank lines (1 > 0) (empty-lines)
2:3 warning comment not indented like content (comments-indentation)
3:1 warning missing document start "---" (document-start)
3:81 error line too long (101 > 80 characters) (line-length)
8:20 error too many spaces before colon (colons)
13:7 error duplication of key "ios" in mapping (key-duplicates)
Now, fix the duplicate key error on line 13 in playbook.yml and run ansible-lint. Note the custom rule (in the custom_rules folder) that checks whether task names are written in all uppercase.
ansible-lint -Rr custom_rules playbook.yml
[289] All task names should be capitalized
playbook.yml:19
Task/Handler: Task 1 - ensure snmp commands exist on ios and vmx devices
[502] All tasks should be named
playbook.yml:23
Task/Handler: cli_config msg=A task without a name, so lazy! __line__=23 __file__=playbook.yml