jinja2 - Append list variable to another list in Ansible -

is possible append variable list static list in ansible?

i can define whole list variable:

my_list:   - 1   - 2   - 3

and use in playbook as

something: {{my_list}}

but cannot seem find how (pseudo code):

list_to_append:    - 3   - 4

and in playbook:

something:   - 1   - 2   - {{append: list_to_append}}

if in fact impossible, suggest use case?

i have list of items in parameter, of them optional , should modifiable using variables.

in other words: have default values + optional values or not added via variables.

the optional values not known in advance, add 1, 2 or 100 of them, not static.

i have default static list ++ configurable variable list append.

edit: found it's with_items , need in normal parameter:

  with_flattened:    - "{{list1}}"    - "{{list2}}"

if want append content, need use set_fact module. if want use merged lists easy this:

{{ list1 + list2 }}

with set_fact this:

- set_fact:     list_merged: "{{ list1 + list2 }}"

Alconcel