Dummy example to write an ansible dynamic inventory in python

ansible_hosts.py

#!/usr/bin/env python

import sys
import re
from optparse import OptionParser
import json


hosts = {
    'all': {
        'hosts': ['node0', 'node1', 'node2'],
        'vars' : {
            'owner': 'me',
            'project': 'dummy'
        }
    }
}


def get_hosts():
    return hosts


def pick_host(hosts, name):
    for g in hosts:
        if name in hosts[g]['hosts']:
            return hosts[g]['vars']




if __name__ == "__main__":
    parser = OptionParser()
    parser.add_option(
        "--list",
        action="store_true",
        dest="list_host",
        default=None,
        help="list hosts"
    )
    parser.add_option(
        "--host",
        dest="host_name",
        help="get info about a HOST",
        metavar="HOST"
    )


    (options, args) = parser.parse_args()

    hosts = get_hosts()


    if options.host_name:
        print(pick_host(hosts, options.host_name))
        sys.exit(0)


    if options.list_host:
        print(json.dumps(hosts))
        sys.exit(0)