class BaseHandler(object):
    """
    An abstract hanlder class to help define how a handler should behave. No
    methods are actually implemented and will raise a not-implemented error
    if an instance of a handler subclass does not implement any of the 
    following methods.
    """
    def new(self, entry):
        """Create a new entry"""
        raise ("""'new' method not defined in handler subclass""")
        
    def update(self, entry, attribute, new_value):
        """Update a given entry. This is useful when properties of a given
        entry are only discovered sometime later in parsing."""
        raise("""'update' method not defined in handler subclass""")

class BaseHandler(object):
    """
    An abstract hanlder class to help define how a handler should behave. No
    methods are actually implemented and will raise a not-implemented error
    if an instance of a handler subclass does not implement any of the 
    following methods.
    """
    def new(self, entry):
        """Create a new entry"""
        raise Exception("""'new' method not defined in handler subclass""")
        
    def update(self, entry, attribute, new_value):
        """Update a given entry. This is useful when properties of a given
        entry are only discovered sometime later in parsing."""
        raise Exception("""'update' method not defined in handler subclass""")

Fix bug in exception throwing (it caused an exception!).
Fix bug in exception throwing (it caused an exception!).
