I thinkered with it for a bit and found the trick, put a space after the comma, and add in extra single quotes (three before and three after each value), like this:
output_expressions=['''http://thiswebsite.com?Done=password''', '''value''', '''another value'''];
You deserve duplicate points for this. I tried 3 back slashes, never thought to do 3 single quotes. I may have found this out by trial and error, but highly doubtful. Thanks Charles, this was just what we needed!