Looking for Python GUI RAD of some sort

I am a retired software engineer, most of my professional life was
spent developing in C, C++ and assembler.

Nowadays I still write programs, for my own use or amusement in the
main, and mostly in Python.  They are mostly non-GUI but I have written
a couple of GUI programs using PyGObject and Gtk.

I'm looking for something that will make things easier designing the
GUI layout and so on, rather than doing it 'by hand' as it were. I
guess what I'm looking for is a RAD of some sort but I can't really
find anything that doesn't seem very complex and heavyweight.

Is there anything out there that provides a drag and drop [ish] tool
that generates actual Python code? I want to be able to play with the
code directly having built the basics.

I don't want a full-blown IDE because they rarely have a decent editor
and tend to hide everything that's going on, or so it seems to me.

Maybe I'm just getting too old for modern software development!
However any ideas would be very welcome. :-)