Advice needed on __del__

[André Roberge]

Suppose I have two classes: 'Jekyll' and 'Hyde' that are
related in a particular way.

When I create a Jekyll object, a Hyde one gets automatically
created (and displayed on a screen).

==== drum roll to announce Python script ===

Nice = Jekyll()    # Nice_twin, a Hyde object, gets created.

Nice.doStuff()     # Nice_twin is doing his own stuff

def subplot():
     Evil = Jekyll()   # Evil_twin gets created and displayed
     Evil.doStuff()    # Evil_twin does stuff on the screen

subplot()

#Evil.doMoreStuff()  would raise an error, as it no longer exists
       # in this namespace; however, Evil_twin still displayed

Nice.doMoreStuff()   # continues to work.

==========End of script, and ask question=======
Evil_twin is still displayed on the screen at the end.
I would like for Evil_twin to disappear.
(I would like for this Hyde, to hide .... ok, bad pun!)

This morning I had the following thought:
I can, when I create a Jekyll object, update
an outside_list.
If, somehow, I could update that list when
a Jekyll object disappears
(perhaps by using __del__, which I have never touched)
that would solve my problem.

I could check outside_list each time I update
the screen display, and remove Evil_twin when
Evil no longer exists.

Any suggestions?

I've already tried lots of things, but nothing works properly.
Every attempt I make involves quite a bit of coding, as
the real-life situation is a bit more complicated than
what I explain here.
So, before I try again, I thought I would ask the
Collective Wisdom on this list.

------
André