I added a couple of lines to fix errors I ran into with Python 2.7.3: Add about line 89, before assignment to some_var, a, b = 3, 4 Added a try-except ar

I added a couple of lines to fix errors I ran into with Python 2.7.3: Add about line 89, before assignment to some_var, a, b = 3, 4 Added a try-except around line 186, to guard the KeyError, try: filled_dict["four"] #=> KeyError except KeyError: print "Raises a KeyError" Added a definition of foo around 320, so calls would work def foo(*seq, **dict): pass