Ansible list of lists - flattening

Question

I am using a set_fact in a playbook to gather data using a regex_findall(). I\'m pulling out two groups with the regex and the ending result becomes a list of lists.

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Answer 1

You want to use with_list instead of with_items.

with_items forcefully flattens nested lists, while with_list feeds argument as is.

---
- hosts: localhost
  gather_facts: no
  vars:
    nested_list: [[a,b],[c,d],[e,f],[g,h]]
  tasks:
    - debug: msg="{{ item[0] }} {{ item[1] }}"
      with_list: "{{ nested_list }}"