Ansible

Create list of dictionaries

- name: Create list of items (with indexed)
  set_fact:
    list_items: "{'index': '{{ item.0 }}', 'value': '{{ item.1 }}' }"
  with_indexed_items: "{{ list }}"
  register: creating_list_items

- name: Create list of dictionaris
  set_fact:
    list: "{{ creating_list_items.results | map(attribute='ansible_facts.list_items') | list }}"

Add all hosts to known_hosts

grep -v "^\[\|^#" hosts | xargs -L1 ssh