code: def points_from_x0y0x1y1(xyxy):
      
      x0 = xyxy[0]
      y0 = xyxy[1]
      x1 = xyxy[2]
      y1 = xyxy[3]
      return "%s,%s %s,%s %s,%s %s,%s" % (
          x0, y0,
          x1, y0,
          x1, y1,
          x0, y1
      )
docs: Constructs a polygon representation from a rectangle described as a list [x0, y0, x1, y1]