Scripts do not appear in menu

[MQ95]

Hi, i'm using Gimp 2.10 on ubuntu-based linux.

I'm trying to follow this guide on how to get started with GIMP scripting, but when I save the .py file in the scripts folder or the plug-ins folders nothing happens.

When I restart GIMP I don't see the option to run that script in the menu.
I've also tried downloading other scripts from the internet, put them in the scripts folder and plug-ins folder, and same thing, they don't appear in the menu.


Am I doing something wrong?
This is the script's code, which I copied from the tutorial:

Code:

#!/usr/bin/python

from gimpfu import *

def first_plugin(timg, tdrawable):
 print "Hello, world!"

register(
 "hello_world",
 "Presents a Hello, World! message",
 "Presents a Hello, World! message",
 "Brad Jones",
 "Brad Jones",
 "2017",
 "<Image>/Image/Hello, World!",
 "RGB*, GRAY*",
 [],
 [],
 first_plugin)

main()

It's from 2017, so maybe it's not compatible anymore?

Thanks for the help guys.