def remove_data_point(self, x, y):
if len(self._data) == <NUM_LIT:1>:<EOL><INDENT>raise ValueError("<STR_LIT>")<EOL><DEDENT>self._data.remove((x, y))<EOL>
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.