Python-Fu Gimp 3.2.4. Get the active image

[rich2005]

(Yesterday, 03:51 PM)Burcador Wrote: ....snip,,,,
My plugin launches a panel with buttons for launching several plugins.

That reads like this plugin https://www.chuckhenrich.com/custom-command-panel-gimp/

It is up to the user to choose the alternative image, which then brings up the plugin dialog.

   

Maybe have a look at the code, there might be something in it that you can apply to your project.