def remove_data_point(self, x, y):
        """Removes the given data point from the series.

        :param x: The numerical x value of the data point to be removed.
        :param y: The numerical y value of the data point to be removed.
        :raises ValueError: if you try to remove the last data point from\
        a series."""

        if len(self._data) == 1:
            raise ValueError("You cannot remove a Series' last data point")
        self._data.remove((x, y))
Removes the given data point from the series.

        :param x: The numerical x value of the data point to be removed.
        :param y: The numerical y value of the data point to be removed.
        :raises ValueError: if you try to remove the last data point from\
        a series.