python-ansible-inventory-example.py

from ansible.cli import CLI
from ansible.template import Templar
from ansible.vars.manager import VariableManager
from ansible.parsing.dataloader import DataLoader
from ansible.inventory.manager import InventoryManager
import ansible.constants as C


def main():
    # The DataLoader is responsible for loading yaml/json content
    loader = DataLoader()
    # Setup vault secrets
    vault_secrets = CLI.setup_vault_secrets(
        loader,
        vault_ids=C.DEFAULT_VAULT_IDENTITY_LIST,
    )
    # Provide the loader with the vault secret
    loader.set_vault_secrets(vault_secrets)
    # If you have a layout where group_vars shared between different inventories are
    # are stored adjacent to playbooks in a separate directory you need to update the 
    # loader basedir. This is similar to how you might need to provide the --playbook-dir
    # flag to ansible-inventory.
    # Example:
    # ansible_directory/
    # |- playbooks/
    #    |- playbook.yml
    #    |- group_vars/
    #       |- webservers/
    # |- testing/
    #    |- group_vars/
    #       |- webservers/
    # |- production/
    #    |- group_vars/
    #       |- webservers/
    loader.set_basedir('playbooks')

    # The InventoryManager creates and manages the inventory using the provided loader
    inventory = InventoryManager(loader=loader, sources='testing')
    # The VariableManager loads variables using the provided loader
    variable_manager = VariableManager(loader=loader, inventory=inventory)

    for host in inventory.get_hosts():
        host_vars = variable_manager.get_vars(host=host)
        # The templar helps us to expand/resolve variables
        # variable_name: {{ inventory_hostname }} --> host.example.com
        templar = Templar(loader=loader, variables=host_vars)
        for var_name, var_value in host_vars.items():
            # Expand variables that require it
            print(var_name, templar.template(var_value))

if __name__ == '__main__':
    main()