ansible - example of dict with array of arrays

output

PLAY [foo] ********************************************************************

GATHERING FACTS ***************************************************************
ok: [localhost]

TASK: [role1 | debug var=redis] ***********************************************
ok: [localhost] => {
    "redis": {
        "database_save_times": [
            [
                900, 
                1
            ], 
            [
                300, 
                10
            ], 
            [
                60, 
                10000
            ]
        ]
    }
}

TASK: [role1 | template dest=/tmp/foo src=foo.j2] *****************************
changed: [localhost]

PLAY RECAP ********************************************************************
localhost                  : ok=3    changed=1    unreachable=0    failed=0

[root@foo ansible]# cat /tmp/foo 
save  900 1
save  300 10
save  60 10000

play.yml

---
- hosts: foo
  roles:
    - role1

role1_defaults_main.yml

redis:
  database_save_times:
    - [900, 1]
    - [300, 10]
    - [60, 10000]

role1_tasks_main.yml

---
- debug: var=redis
- template: dest=/tmp/foo src=foo.j2

role1_templates_foo.j2

{% for i in redis.database_save_times %}
save  {{ i[0] }} {{ i[1] }}
{% endfor %}