Case insenstive choice example

sample_choices.py

from __future__ import absolute_import, division, print_function

__metaclass__ = type


DOCUMENTATION = """
module: sample_choices
short_description: Demo case insensitive choices.
description:
- Demo case insensitive choices.
version_added: 1.0.0
options:
  foo:
    description:
    - Option that take case insensitive choices.
      Valid values are one of I(bar), I(bam), I(baz) and are case insensitive.
    required: true
"""
from ansible.module_utils.basic import AnsibleModule

FOO_CHOICES = ['bar', 'bam', 'baz']
def case_insensitive_choice(value, **kwargs):
    if value.lower() not in FOO_CHOICES:
        msg = f"Invalid value {value}. Valid value is one of {', '.join(FOO_CHOICES)} and is case insensitive"
        raise ValueError(msg)

def main():
    """entry point for module execution"""
    argument_spec = dict(
        foo=dict(required=True, type=case_insensitive_choice),
    )
    result = {"changed": False}
    
    module = AnsibleModule(
        argument_spec=argument_spec, supports_check_mode=True
    )

    module.exit_json(**result)


if __name__ == "__main__":
    main()