---
- name: Set fact
  ansible.builtin.set_fact:
    a:
      b:
        c:
          d:
            - 0
            - 1
          e:
            - true
            - false

- name: Retrieve a value deep inside a using a path
  ansible.builtin.set_fact:
    value: "{{ lookup('ansible.utils.get_path', a, path) }}"
  vars:
    path: b.c.d[0]

# TASK [Retrieve a value deep inside a using a path] ******************
# ok: [localhost] => changed=false
#   ansible_facts:
#     value: '0'

#### Working with hostvars

- name: Retrieve a value deep inside all of the host's vars
  ansible.builtin.set_fact:
    value: "{{ lookup('ansible.utils.get_path', look_in, look_for) }}"
  vars:
    look_in: "{{ hostvars[inventory_hostname] }}"
    look_for: a.b.c.d[0]

# TASK [Retrieve a value deep inside all of the host's vars] ********
# ok: [nxos101] => changed=false
#   ansible_facts:
#     as_filter: '0'
#     as_lookup: '0'

#### Used alongside ansible.utils.to_paths

- name: Get the paths for the object
  ansible.builtin.set_fact:
    paths: "{{ lookup('ansible.utils.to_paths', a, prepend='a') }}"

- name: Retrieve the value of each path from vars
  ansible.builtin.debug:
    msg: "The value of path {{ path }} in vars is {{ lookup('ansible.utils.get_path', hostvars[inventory_hostname], path) }}"
  loop: "{{ paths.keys() | list }}"
  loop_control:
    loop_var: path
# TASK [Get the paths for the object] *******************************
# ok: [nxos101] => changed=false
#   ansible_facts:
#     paths:
#       a.b.c.d[0]: 0
#       a.b.c.d[1]: 1
#       a.b.c.e[0]: true
#       a.b.c.e[1]: false

# TASK [Retrieve the value of each path from vars] ******************
# ok: [nxos101] => (item=a.b.c.d[0]) =>
#   msg: The value of path a.b.c.d[0] in vars is 0
# ok: [nxos101] => (item=a.b.c.d[1]) =>
#   msg: The value of path a.b.c.d[1] in vars is 1
# ok: [nxos101] => (item=a.b.c.e[0]) =>
#   msg: The value of path a.b.c.e[0] in vars is true
# ok: [nxos101] => (item=a.b.c.e[1]) =>
#   msg: The value of path a.b.c.e[1] in vars is False

#### Working with complex structures and transforming results

# - name: Retrieve the current interface config
#   cisco.nxos.nxos_interfaces:
#     state: gathered
#   register: interfaces

# - name: Get the description of several interfaces
#   ansible.builtin.debug:
#     msg: "{{ lookup('ansible.utils.get_path', rekeyed, item) }}"
#   vars:
#     rekeyed:
#       by_name: "{{ interfaces.gathered|ansible.builtin.rekey_on_member('name') }}"
#   loop:
#   - by_name['Ethernet1/1'].description
#   - by_name['Ethernet1/2'].description|upper
#   - by_name['Ethernet1/3'].description|default('')

# TASK [Get the description of several interfaces] ******************
# ok: [nxos101] => (item=by_name['Ethernet1/1'].description) => changed=false
#   msg: Configured by ansible
# ok: [nxos101] => (item=by_name['Ethernet1/2'].description|upper) => changed=false
#   msg: CONFIGURED BY ANSIBLE
# ok: [nxos101] => (item=by_name['Ethernet1/3'].description|default('')) => changed=false
#   msg: ''