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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 line_init(xo: int, yo: int, xd: int, yd: int) -> None: """Initilize a line whose points will be returned by `line_step`. This function does not return anything on its own. Does not include the origin point. Args: xo (int):
 X starting point. yo (int):
 Y starting point. xd (int):
 X destination point. yd (int):
 Y destination point. .. deprecated:: 2.0 Use `line_iter` instead. """

    lib.TCOD_line_init(xo, yo, xd, yd)