Initialize in main() vs outside main()

in_main.py

 #!/usr/bin/python
 from ansible.module_utils.basic import AnsibleModule


 def main():
     mod = AnsibleModule(
         argument_spec=dict(
             url=dict(required=True),
             dest=dict(required=False, default="/tmp/firstmod")
         )
     )

     save_data(mod)


 def save_data(mod):
     data = fetch_data(mod.params["url"])
     if write_data(data, mod.params["dest"]):
         mod.exit_json(msg="Data saved", changed=True)
     else:
         mod.exit_json(msg="Up to date", changed=False)


 def fetch_data(mod, url):
     raise NotImplementedError


 def write_data(data, dest):
     raise NotImplementedError


 if __name__ == '__main__':
     main()

outside_main.py

 #!/usr/bin/python
 from ansible.module_utils.basic import AnsibleModule


 def main(mod):
     data = fetch_data(mod.params["url"])
     if write_data(data, mod.params["dest"]):
         mod.exit_json(msg="Data saved", changed=True)
     else:
         mod.exit_json(msg="Up to date", changed=False)


 def fetch_data(mod, url):
     raise NotImplementedError


 def write_data(data, dest):
     raise NotImplementedError


 if __name__ == '__main__':
     mod = AnsibleModule(
         argument_spec=dict(
             url=dict(required=True),
             dest=dict(required=False, default="/tmp/firstmod")
         )
     )

     main(mod)