Is it possible to flatten list of lists in Ansible?

Question

Need to flatten the array list FROM

[
    [
        [
            "10.11.33.11"
        ]
    ],
    [
        [
            "10.11.88.88"
        ]
    ]
]

TO

[ "10.11.33.11", "10.11.88.88" ]

docs.ansible.com/ansible/latest/user_guide/…

Zeitounator
– Zeitounator

2022-02-10 23:49:45 +00:00
Commented Feb 10, 2022 at 23:49 — Zeitounator
– Zeitounator, Commented Feb 10, 2022 at 23:49

U880D · Accepted Answer · 2022-02-12 06:58:44Z

0

I understand your question as "How to manage list variables?

Since you have list of lists,

---
- hosts: localhost
  become: false
  gather_facts: false

  vars:
    LIST: [ [ ['10.11.33.11'] ],[ ['10.11.88.88'] ] ]

  tasks:

  - name: Show LIST flattened
    debug:
      msg: "{{ LIST | flatten(levels=2) }}"

you need need to address the level. Resulting into an output of

TASK [Show LIST flattened] *******
ok: [localhost] =>
  msg:
  - 10.11.33.11
  - 10.11.88.88

Background Information

if someone may be interested.

answered Feb 12, 2022 at 6:58

U880D

12.8k7 gold badges40 silver badges88 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

sam Over a year ago

Thanks, this really helps. I did make it work something like this set_fact: ip_addresses : "{{ ip_addresses | default([]) }} + [ '{{ item[0] }}' ]" with_items: "{{ LIST }}"

Collectives™ on Stack Overflow

Is it possible to flatten list of lists in Ansible?

1 Answer 1

1 Comment

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Linked

Related