View difference between Paste ID: c8kbqc4w and vJfUzUgX

 def draw():
     draw = tcod.console_put_char_ex
     w, h = screen_size()
     for x in range(w):
         for y in range(h):
             c, fg, bg = yield cartesian.Point(x, y)
             fg, bg = (getattr(tcod, str(fg), tcod.white),
                       getattr(tcod, str(bg), tcod.black))
             draw(None, x, y, c, fg, bg)
-    yield None
+
 # Outside the generator
 def render(self):
     draw = render.draw()
     point = draw.send(None)
     world = self.world
     while True:
         world_coord = self.camera.position + point
         tile_data = ('.', 'red', 'blue')
         if world_coord in world:
             tile = world[world_coord]
             tile_data = (tile.repr, tile.fg, tile.bg)
         try:
             point = draw.send(tile_data)
         except StopIteration:
             break