def find_range_ix_in_point_list(start, end, point_list):
    """Returns the index range all points inside the given range.

    Parameters
    ---------
    start : float
        The start of the desired range.
    end : float
        The end of the desired range.
    point_list : sortedcontainers.SortedList
        A list of points.

    Returns
    -------
    iterable
        The index range of all points inside the given range.

    Example
    -------
    >>> from sortedcontainers import SortedList
    >>> point_list = SortedList([5, 8, 15])
    >>> find_range_ix_in_point_list(3, 4, point_list)
    [0, 0]
    >>> find_range_ix_in_point_list(3, 7, point_list)
    [0, 1]
    >>> find_range_ix_in_point_list(3, 8, point_list)
    [0, 2]
    >>> find_range_ix_in_point_list(4, 15, point_list)
    [0, 3]
    >>> find_range_ix_in_point_list(4, 321, point_list)
    [0, 3]
    >>> find_range_ix_in_point_list(6, 321, point_list)
    [1, 3]
    """
    return [point_list.bisect_left(start), point_list.bisect_right(end)]