>You're talking about eliminating duplicates in a list right?
No, I'm talking about any atbitrary list processing operation. Some combination of map, fold, and filter, for example.
So, in order to do that in an Ansible playbook, I need to write a Python function to do it and use it in the YAML file as a filter because the DSL isn't expressive enough to do it on its own. So... why wouldn't I want to just use Python again?