attempt at building a variable on the end node of a list of mounts i'm interested in

set_facts_testing

---
- hosts: all
  sudo: yes
  tasks:
    - name: mount filter
      set_fact: 
        args:
          mounts="{{ x['mount'] for x in ansible_mounts if x['mount'].endswith('da3') }}"

    - name: echo each mount
      debug: msg="{{'mount ' + item }}"
      with_items: $mounts

    - name: echo all mounts
      debug: msg=$mounts