general class functions

[syd]

Many many thanks, Andrea and Kent!

To keep changes to calls in my current code to a minimum, I'm hoping I
can encode Andrea's "on-the-fly" get function.  I added Andrea's
__getattr__ to my Library() class, populated the class with a few
nations, and tried:

>>> library.get_continent('Europe')
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "foo.py", line 16, in __getattr__
    return self.__dict__[name]
KeyError: '__repr__'

I then commented out lines 15 and 16...
    #else:
      #return self.__dict__[name]

... and re-ran.

>>> library.get_continent('Europe')
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: 'NoneType' object is not callable

I tweaked a bit, but I could not get to the bottom of this problem.  I
see the logic here (and it's brilliant I should add, Andrea), but I'm
not sure what is wrong.

Ideas?