code: def pixel(self, coord_x, coord_y):
          # type: (int, int) -> Pixel
          
  
          try:
              return self.pixels[coord_y][coord_x]  # type: ignore
          except IndexError:
              raise ScreenShotError(
                  "Pixel location ({}, {}) is out of range.".format(coord_x, coord_y)
              )
docs: Returns the pixel value at a given position.
  
          :param int coord_x: The x coordinate.
          :param int coord_y: The y coordinate.
          :return tuple: The pixel value as (R, G, B).