Pushing items to a var while looping over another var in Ansible Jinja2 template

Question

Inventory:

[Test]
local ansible_host=localhost

[Test:vars]
my_clusters=\"A,B,C\"

I\'m trying to write a jinja2 template iterating over m

Answer 1

This can be achieved with assignments introduced in Jinja2 2.10:

{% set ns = namespace(str="") %}
{% for cluster in hostvars[groups['Test'][0]]['my_clusters'].split(',') %}
{% set ns.str = ns.str + "Cluster" %}
{%- if not loop.last %}{% set ns.str = ns.str + "," %}{% endif %}
{% endfor %}

---

The above answers the question from the title, but there are some syntactical problems with your code:

• lack of set inside the expression,
• using += operator,
• not handling the last ,.