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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def blit( self, dest: "Console", dest_x: int = 0, dest_y: int = 0, src_x: int = 0, src_y: int = 0, width: int = 0, height: int = 0, fg_alpha: float = 1.0, bg_alpha: float = 1.0, key_color: Optional[Tuple[int, int, int]] = None, ) -> None: """Blit from this console onto the ``dest`` console. Args: dest (Console):
 The destintaion console to blit onto. dest_x (int):
 Leftmost coordinate of the destintaion console. dest_y (int):
 Topmost coordinate of the destintaion console. src_x (int):
 X coordinate from this console to blit, from the left. src_y (int):
 Y coordinate from this console to blit, from the top. width (int):
 The width of the region to blit. If this is 0 the maximum possible width will be used. height (int):
 The height of the region to blit. If this is 0 the maximum possible height will be used. fg_alpha (float):
 Foreground color alpha vaule. bg_alpha (float):
 Background color alpha vaule. key_color (Optional[Tuple[int, int, int]]):
 None, or a (red, green, blue) tuple with values of 0-255. .. versionchanged:: 4.0 Parameters were rearraged and made optional. Previously they were: `(x, y, width, height, dest, dest_x, dest_y, *)` """

        # The old syntax is easy to detect and correct.
        if hasattr(src_y, "console_c"):
            (
                src_x,  # type: ignore
                src_y,
                width,
                height,
                dest,  # type: ignore
                dest_x,
                dest_y,
            ) = (dest, dest_x, dest_y, src_x, src_y, width, height)
            warnings.warn(
                "Parameter names have been moved around, see documentation.",
                DeprecationWarning,
                stacklevel=2,
            )

        key_color = key_color or self._key_color
        if key_color:
            key_color = ffi.new("TCOD_color_t*", key_color)
            lib.TCOD_console_blit_key_color(
                self.console_c,
                src_x,
                src_y,
                width,
                height,
                dest.console_c,
                dest_x,
                dest_y,
                fg_alpha,
                bg_alpha,
                key_color,
            )
        else:
            lib.TCOD_console_blit(
                self.console_c,
                src_x,
                src_y,
                width,
                height,
                dest.console_c,
                dest_x,
                dest_y,
                fg_alpha,
                bg_alpha,
            )