def _get_cell_range(sheet_obj, start_row, start_col, end_row, end_col):
    """
    Get cell range in xlrd module as two level nested list.

    Arguments:
        sheet_obj {xlrd worksheet object} -- xlrd worksheet instance
        start_row {int} -- Number of start row
        start_col {int} -- Number of start column
        end_row {int} -- Number of last row
        end_col {int} -- Number of last column

    Returns:
        list -- Cell range as two level nested list
    """
    return [
        sheet_obj.row_slice(row, start_colx=start_col, end_colx=end_col + 1)
        for row in range(start_row, end_row + 1)
    ]