Accessing items in nested dicts and lists in Jinja2 - jinja2

Question

Data:
primaries:
ca:
- 10.51.60.45
- 10.51.60.46
ny:
- 10.52.60.45
- 10.52.60.46
az:
- 10.53.60.45
- 10.53.60.46
I want a flattened list of all IP's(or a for loop which can iterate through just the IP's), but the cities ca and ny and az could be anything.

Answer 1

Ansible's extract filter, which extracts the value of a key from a container, makes this very simple.
{{ primaries | map('extract', primaries) | flatten }}
You can also directly use the dictionary's values() method, which is slightly less flexible (the extract approach allows you to filter the keys beforehand, which you can't do here.)
{{ primaries.values() | flatten }}

Answer 2

You just need to iterate through the keys of the dictionary.
{% for region, ips in primaries.items() %}
{% for ip in ips %}
{{ ip }}
{% endfor %}
{% endfor %}
Read the Jinja docs on for.

Answer 3

Using Ansible, you can get a flattened list of ips using the json_query filter:
List of ip addresses:
{% for addr in primaries|json_query('*[][]') %}
- {{ addr }}
{% endfor %}
This results in:
List of ip addresses:
- 10.51.60.45
- 10.51.60.46
- 10.52.60.45
- 10.52.60.46
- 10.53.60.45
- 10.53.60.46
Here's a runnable example:
- hosts: localhost
gather_facts: false
vars:
primaries:
ca:
- 10.51.60.45
- 10.51.60.46
ny:
- 10.52.60.45
- 10.52.60.46
az:
- 10.53.60.45
- 10.53.60.46
tasks:
- copy:
dest: addresses.txt
content: |
List of ip addresses:
{% for addr in primaries|json_query('*[][]') %}
- {{ addr }}
{% endfor %}
The json_query filter uses the JMESPath query language.