- name: Count elements hosts: localhost
vars:
items: [1, 2, 3, 4] tasks:
- name: Display count debug:
var: "{{ items | length }}"
Explanation:
The length filter counts the number of elements in a list, dictionary, or string.

ansible-inventory -i idm_inventory.py --list
Explanation:
Running the dynamic inventory script with ansible-inventory ensures it generates valid host data.

# playbook.yml
- name: Retrieve ansible_host hosts: web1
tasks:
- debug:
var: ansible_host
Explanation:
Dynamic variable retrieval helps validate host-level settings such as IP addresses or DNS names.

- name: Combine lists hosts: localhost vars:
list1: [1, 2, 3]
list2: [4, 5, 6] tasks:
- name: Merge lists debug:
var: "{{ list1 + list2 }}"
Explanation:
Combining lists into a single structure is straightforward with Ansible filters, enabling unified data manipulation.

podman run --rm -v $(pwd):/workspace -w /workspace my_execution_env:1.0 ansible-inventory -i inventory_script.py --list
Explanation:
Dynamic inventory scripts executed within an EE ensure inventory generation is consistent and isolated from the host environment.