[Urwid] Edit widgets with multiple attributes

[James Reeves]

Hi there,

I'm having a little difficulty understanding how urwid renders palette 
attributes to a canvas. I'd like to subclass the Edit widget and have it 
apply different attributes to areas of text that match certain regular 
expressions - in other words, a syntax-highlighting feature.

Is it currently possible to do this in urwid, and if so, does anyone 
have any suggestions about how might be the best way to go about it?

Thanks in advance!

--
James Reeves