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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 find_all(self, board: Union[chess.Board, int], *, minimum_weight: int = 1, exclude_moves: Container[chess.Move] = ()) -> Iterator[Entry]: """Seeks a specific position and yields corresponding entries."""

        try:
            key = int(board)  # type: ignore
            context = None  # type: Optional[chess.Board]
        except (TypeError, ValueError):
            context = typing.cast(chess.Board, board)
            key = zobrist_hash(context)

        i = self.bisect_key_left(key)
        size = len(self)

        while i < size:
            entry = self[i]
            i += 1

            if entry.key != key:
                break

            if entry.weight < minimum_weight:
                continue

            if context:
                move = context._from_chess960(context.chess960, entry.move.from_square, entry.move.to_square, entry.move.promotion, entry.move.drop)
                entry = Entry(entry.key, entry.raw_move, entry.weight, entry.learn, move)

            if exclude_moves and entry.move in exclude_moves:
                continue

            if context and not context.is_legal(entry.move):
                continue

            yield entry