ansible loop list and range - loops

Question

I have a list:
['bob', 'john', 'jack', 'rick']
I have a fixed range: 10,20 step: 2
I want to build this variable:
my_var:
- name: bob
content: '10'
- name: john
content: '12'
- name: jack
content: '14'
- name: rick
content: '16'
It seems I have to use loop but I don't understand how !

Answer 1

Loop the lists with the zip filter. For example, the playbook
- hosts: localhost
vars:
my_users: [bob, john, jack, rick]
tasks:
- set_fact:
my_var: "{{ my_var|default([]) +
[{'name': item.1, 'content': item.0}] }}"
loop: "{{ range(10,20,2)|zip(my_users)|list }}"
- debug:
var: my_var
gives
my_var:
- {content: 10, name: bob}
- {content: 12, name: john}
- {content: 14, name: jack}
- {content: 16, name: rick}
The iteration is not needed if you can use the collection community.general. For example, the playbook below gives the same result
- hosts: localhost
vars:
my_users: [bob, john, jack, rick]
my_var: "{{ range(10,20,2)|
zip(my_users)|
map('zip', ['content', 'name'])|
map('map', 'reverse')|
map('community.general.dict')|
list }}"
tasks:
- debug:
var: my_var
The values of the attribute content are integers in both options above. Convert the integers to strings if you need them. For example, in the loop, change the task
- set_fact:
my_var: "{{ my_var|default([]) +
[{'name': item.1, 'content': item.0|string}] }}"
loop: "{{ range(10,20,2)|zip(my_users)|list }}"
, or change the declaration
my_var: "{{ range(10,20,2)|map('string')|
zip(my_users)|
map('zip', ['content', 'name'])|
map('map', 'reverse')|
map('community.general.dict')|
list }}"
Both options give the same result (note the quoted numbers (strings) instead of the unquoted numbers in the first two options)
my_var:
- {content: '10', name: bob}
- {content: '12', name: john}
- {content: '14', name: jack}
- {content: '16', name: rick}