Thanks to all for the informative answers.
You made me realize this is a wxPython issue. I have to say, wxPython
seems useful, and I'm glad it is available - but it doesn't have the
gentlest of learning curves.
--
http://mail.python.org/mailman/listinfo/python-list
Pretty new to Python, but I thought I understood what is meant by "an
assignment is a reference."
Until I tried to understand this.
Here is a (fragment of an) event handler for a group of three wxPython
toggle buttons. The idea is to change the appearance of the label of
the button that was press
