Ansible complex module data?????

comdata-vars.yml

---
zones:
- { zone: one.de,            policy: rfc5011 }
- { zone: thirteen.com,      policy: default }

comdata.py

#!/usr/bin/python
# -*- coding: utf-8 -*-

import os
import ast
try:
    import json
except ImportError:
    import simplejson as json


# ==============================================================
# main

def main():

    argument_spec = url_argument_spec()
    argument_spec.update(
        zlist    = dict(required=True, type='str')
    )

    module = AnsibleModule(
        argument_spec = argument_spec,
    )

    zlist = module.params['zlist']
    #f = open('/tmp/j', 'w')
    #f.write(zlist)
    #f.close()
    # >> [{'policy': 'rfc5011', 'zone': 'one.de'}, {'policy': 'default', 'zone': 'thirteen.com'}]
    try:
        data = json.loads(zlist)   # zlist has single quotes ('param': 'value') which is wrong
    except:
        data = ast.literal_eval(zlist)


    res = []
    for z in data:
        res.append(z['zone'].upper())

    module.exit_json(changed=True, msg='OK', newdata=res)

# import module snippets
from ansible.module_utils.basic import *
from ansible.module_utils.urls import *
main()

comdata.yml

---
- hosts:
  - localhost
  connection: local
  vars_files:
   - comdata-vars.yml

  tasks:
  - name: COMplex DATa
    action: comdata
#       zlist="{{ zones }}"
    args:
       zlist: "{{ zones }}"
#     zlist: "{{ lookup('file', 'f.json') }}"
    register: n

  - action: debug var=n.newdata