Sample module that returns a string hashed in various ways

hasher.py

#!/usr/bin/python

import hashlib

def main():

    module = AnsibleModule(
        argument_spec = dict(
           string = dict(required=True)
        ),
    )

    string = module.params['string']

    md5 = hashlib.md5(string).hexdigest()
    sha1 = hashlib.sha1(string).hexdigest()
    sha256 = hashlib.sha256(string).hexdigest()
    sha512 = hashlib.sha512(string).hexdigest()

    module.exit_json(changed=True, original_string=string, md5_hash=md5, sha1_hash=sha1, sha256=sha256, sha512=sha512)

from ansible.module_utils.basic import *
if __name__ == '__main__':
  main()