Added parentheses around multiple except clauses.

The exception handling code on line 60 threw an invalid syntax error when I attempted to compile this in Python 3.3 for Windows.  Placing the parentheses around the except clauses fixed this and works in Python 2.x as well. Sources (http://docs.python.org/3/tutorial/errors.html and http://docs.python.org/2/tutorial/errors.html)