The list problem

list.yml

---

- hosts: all
  gather_facts: False
  tasks:

  - set_fact:
      myhosts:
        - 127.0.0.1
        - 127.0.0.2
        - 127.0.0.3

  # I want to put this list in a file, formatted as so: ["127.0.0.1", "127.0.0.2", "127.0.0.3"]
  # But ansible sees it as a list and the output becomes the pythonic: ['127.0.0.1', '127.0.0.2', '127.0.0.3']

  # This comes out as a list, I need a string
  - set_fact:
      var: "[ \"{{ myhosts | join('\", \"')}}\" ]"
  - debug: var=var

  # This comes out as a string, I need no underscore on it
  - set_fact:
      var: "_[ \"{{ myhosts | join('\", \"')}}\" ]"
  - debug: var=var

  # This also comes out as a list
  - set_fact:
      var: >
        [ "{{ myhosts | join('", "')}}" ]
  - debug: var=var
  
  # Also parsed as a list
  - set_fact:
      var: "{{ myhosts | to_json }}"
  - debug: var=var

# ansible-playbook -i "localhost," list.yml