Thanks, I didn't know about "x not in D"! On the same note: http://dacavtricks.wordpress.com/2011/05/23/python-default-values-in-a-dictionary/ http://dacavtric

Thanks, I didn't know about "x not in D"! On the same note: http://dacavtricks.wordpress.com/2011/05/23/python-default-values-in-a-dictionary/ http://dacavtricks.wordpress.com/2011/05/23/python-default-v...