---

- hosts: localhost
  vars:
    my_loop: >
            [
              {% for i in range(1, 2) %}
                {
                  'name':'prefix-{{ i }}'
                }
              {% if not loop.last %},{% endif %}
              {% endfor %}
            ]
    ips_str: |
          {% for idx in range(0,2) %}
          - name: 192.168.100.{{ idx }}
            test: {{ idx }}
          {% endfor %}
    ips: "{{ ips_str | from_yaml }}"

  tasks:
    - debug:
        msg: "{{ my_loop }}"
    - debug:
        msg: "{{ item.name }}"
      loop: "{{ my_loop }}"

    - debug:
        msg: "{{ ips }}"
    - debug:
        msg: "{{ item.name }}"
      loop: "{{ ips }}"