Possible to script Metadata?

[rich2005]

@Ofnuts - question about xcf format comment

This a shell using your two lines of code.

Code:

#!/usr/bin/env python
# -*- coding: utf-8 -*-

# adds a comment

import re, os, sys
from gimpfu import *

def add_comment (image,drawable,comment):
            
    if not comment:
        comment="no comment "
        p=gimp.Parasite('gimp-comment',0,comment)
        image.parasite_attach(p)
    else:
        p=gimp.Parasite('gimp-comment',0,comment)
        image.parasite_attach(p)
      
register(
    "python_fu_add_comment",
    " ",
    " ",
    "",
    " ",
    "2020",
    "<Image>/Tools/add comment",
    "*",
    [
        (PF_TEXT, "comment", "new comment", "")
     ],  
    [],
    add_comment,
            )
main()

Using this on a png file (same with jpeg)
Files has default comment - new comment added using script - png exported - file closed - opened again - comment is there. https://i.imgur.com/6QvhWWr.mp4

Same procedure but using xcf format. The comment is not saved (or is it lost when the xcf is reopened?) Whichever way the comment has gone. https://i.imgur.com/QhoiZ67.mp4