def __init__(self, copy = None):
if copy is None:
# Get a full bag from the Alphabet; this varies between languages
self._tiles = Alphabet.full_bag()
else:
# Copy constructor: initialize from another Bag
self._tiles = copy._tiles
def is_full(self):
""" Returns True if the bag is full, i.e. no tiles have been drawn """
return self.num_tiles() == len(Alphabet.full_bag())
