Selects a subset of a list based on a matching regular expression

select_list_regex.py

#!/usr/bin/python

DOCUMENTATION = '''
---
module: select_list_regex
short_description: Selects a subset of a list based on a matching regular expression
'''

EXAMPLES = '''
- name: Select hosts with the word Admin from a list of all hosts
  select_list_regex:
    regex: '.*Admin.*'
    input_list: "{{ all_stacks }}"
  register: result
'''

import re
from ansible.module_utils.basic import *

#  WANT_JSON

def main():

    fields = {
        "regex": {
            "required": True, "type": "str"
        },
        "input_list": {
            "required": True, "type": "list"
        },
    }

    module = AnsibleModule(argument_spec=fields)
    regex_string = module.params["regex"]
    input_list = module.params["input_list"]

    match_list = []

    for item in input_list:
        match_regex = re.search(regex_string, item)
        if match_regex is not None:
            match_string = match_regex.group(0)
            if len(match_string) > 0:
                match_list.append(match_string)

    module.exit_json(changed=True, meta=match_list)

if __name__ == '__main__':
    main()