sample of module

gconf

#!/usr/bin/python

import json
import re
import subprocess
from subprocess import call

from ansible.module_utils.basic import *

def _escape_single_quotes(string):
    return re.sub("'", r"'\''", string)

def _set_value(user, key, value, argument_type):

    return subprocess.check_output([
        'su', '-', user , '-c', " ".join([ '/usr/bin/gconftool-2 --set --type {} {} "{}"'.format(argument_type, _escape_single_quotes(key), value)])
    ]).strip()

def _get_value(user, key):

    # return subprocess.check_output([
    #     'su', '-', user , '-c', '/usr/bin/gconftool-2 --get {}'.format(_escape_single_quotes(key))
    # ]).strip()
    return subprocess.check_output([
        'su', '-', user , '-c', 'gconftool-2 --get {}'.format(_escape_single_quotes(key))
    ]).strip()


def main():

    module = AnsibleModule(
        argument_spec = {
            'state': { 'choices': ['present'], 'default': 'present' },
            'type': { 'choices': ['string', 'bool'], 'default': 'string' },
            'user': { 'required': True },
            'key': { 'required': True },
            'value': { 'required': True },
        },
        supports_check_mode = True,
    )

    params = module.params
    state = module.params['state']
    user = module.params['user']
    argument_type = module.params['type']
    key = module.params['key']
    value = module.params['value']

    old_value = _get_value(user, key)
    changed = old_value != value

    if changed and not module.check_mode:
        _set_value(user, key, value, argument_type)

    print json.dumps({
        'changed': changed,
        'key': key,
        'value': value,
        'old_value': old_value,
    })

main()

* including generated source, if any, saving to: /home/joseph/.ansible_module_generated
* this may offset any line numbers in tracebacks/debuggers!
***********************************
RAW OUTPUT
{"changed": true, "old_value": "Source Code Pro Semi-Bold 12", "value": "Source Code Pro Semi-Bold 15", "key": "/apps/gnome-terminal/profiles/base-16-monokai-dark/font"}


***********************************
PARSED OUTPUT
{
    "changed": true, 
    "key": "/apps/gnome-terminal/profiles/base-16-monokai-dark/font", 
    "old_value": "Source Code Pro Semi-Bold 12", 
    "value": "Source Code Pro Semi-Bold 15"
}

second run

* including generated source, if any, saving to: /home/joseph/.ansible_module_generated
* this may offset any line numbers in tracebacks/debuggers!
***********************************
RAW OUTPUT
{"changed": false, "old_value": "Source Code Pro Semi-Bold 15", "value": "Source Code Pro Semi-Bold 15", "key": "/apps/gnome-terminal/profiles/base-16-monokai-dark/font"}


***********************************
PARSED OUTPUT
{
    "changed": false, 
    "key": "/apps/gnome-terminal/profiles/base-16-monokai-dark/font", 
    "old_value": "Source Code Pro Semi-Bold 15", 
    "value": "Source Code Pro Semi-Bold 15"
}

still no change for this user.

su joseph -c 'gconftool-2 --get /apps/gnome-terminal/profiles/base-16-monokai-dark/font'
Source Code Pro Semi-Bold 12