ansible/ansible

Hi Jay, here those play vars doesn't end up in hostvars[inventory_hostname].
and yes type is a bad example for a variable
I am using vars[] to force the interpretation of a string into a variable, which is the problem I have in my actual project.
vars[dvars] => vars['dirs'] => [{ name: "dir_a", path: "/tmp/somedir/a"}]

To be more precise my question is: What is the approprate way to make ansible inteprete variable that referes to other variables, and/or values(string) that referes to variables ? Espacially in this kind of nested cases !

In this example dir_a is never interpreted through vars[dvar] (gather_facts value doesn't change anything)

- hosts: all
  gather_facts: yes
  vars:
    dvar: "dirs"
    dir_a: /tmp/somedir/a
    dirs:
      - name: "dir_a"
        path: "{{ dir_a }}"
  tasks:
    - name: debug dvar
      debug:
        msg: "{{ dvar }}"

    - name: debug dirs
      debug:
        msg: "{{ dirs }}"

    - name: debug vars[dvar]
      debug:
        msg: "{{ vars[dvar] }}"

    - name: debug hostvars[inventory_hostname][dvar]
      debug:
        msg: "{{ hostvars[inventory_hostname][dvar] }}"

TASK [debug dvar] ****************************************************************************************************************************************************************************
ok: [test1-server] => {
    "msg": "dirs"
}

TASK [debug dirs] ****************************************************************************************************************************************************************************
ok: [test1-server] => {
    "msg": [
        {
            "name": "dir_a", 
            "path": "/tmp/somedir/a"
        }
    ]
}

TASK [debug vars[dvar]] **********************************************************************************************************************************************************************
ok: [test1-server] => {
    "msg": [
        {
            "name": "dir_a", 
            "path": "{{ dir_a }}"
        }
    ]
}
TASK [debug hostvars[inventory_hostname][dvar]] **********************************************************************************************************************************************
fatal: [test1-server]: FAILED! => {"msg": "The task includes an option with an undefined variable. The error was: 'dict object' has no attribute u'dirs'\
....
line 24, column 7, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n    - name: debug hostvars[inventory_hostname][dvar]\n      ^ here\n\nexception type: <class 'ansible.errors.AnsibleUndefinedVariable'>\nexception: 'dict object' has no attribute u'dirs'"}