def _blob_walk(board, point, blob_stone, walked_points):
walked_points.add(point)
for neighbor_point in Point.neighbor_points(point):
if neighbor_point not in walked_points and Board.occupies(
board, blob_stone, neighbor_point):
RealBoard._blob_walk(board, neighbor_point, blob_stone,
walked_points)
def get_blob_liberties(board, blob):
blob_liberties = set()
for point in blob:
neighbor_points = Point.neighbor_points(point)
for neighbor_point in neighbor_points:
if not Board.occupied(board, neighbor_point):
blob_liberties.add(neighbor_point)
return blob_liberties