Ansible nested loops, how to set inner loop variable based on outer variable - ansible

Question

I'm having problems with a nested loop on ansible.
I'm using ansible 2.5.2 with the following config files:
file hosts:
[group1]
host1
host2
host3
[group2]
hostA
file host_vars/host{N} (where N is the number for each host on group1):
variable:
- { line: "keyB" , file: "keyc"}
- { line: "key2" , file: "key3"}
I need to execute on hostA one task for each line in host_vars/host{N}.
in pseudo code, need something like this:
- name: modify file
for host in groups['group1']:
for item in host['variables']:
lineinfile: "path={{ host }}/{{ item.file }} line={{ item.line }}"
using jinja2 loops does not work:
- name: Modify files
lineinfile: "{% for linea in hostvars[item]['variables'] %}
path={{ item }}/{{ linea.file }}
line={{ linea.line }}
{% endfor %}"
loop: "{{ groups['group1'] }}"
normal nested loops does not work either because the inner loop deppends on the hostname:
- name: Modify files
lineinfile: "path={{ item[0] }}/{{ item[1]['file'] }} line={{ item[1]['line'] }}"
with_nested:
- "{{ groups['group1'] }}"
- "{{ hostvars[item[0]]['variables'] }}"
There is another way to cicle nested loops?

Answer 1

I solved my problem using loop_control,
I add a new file: inner.yml
- name: Modify files
lineinfile: "path={{ outer_item }}/{{ item.file }} line={{ item.line }}"
loop: "{{ hostvars[outer_item]['variables'] }}"
And defined my task file as follows
- include_tasks: inner.yml
loop: "{{ groups['group1'] }}"
loop_control:
loop_var: outer_item
which solves my problem of using two nested variables on loops.