How to use the tablib.packages.openpyxl.shared.xmltools.start_tag function in tablib

dtype = 'boolean'
            elif isinstance(cell, (int, float)):
                dtype = 'numeric'
            elif isinstance(cell, (datetime.datetime, datetime.date)):
                dtype = 'datetime'
                cell = self._shared_date.datetime_to_julian(cell)
                attributes['s'] = STYLES[dtype]['style']
            elif cell and cell[0] == '=':
                dtype = 'formula'
            else:
                dtype = 'string'
                cell = self._string_builder.add(cell)

            attributes['t'] = STYLES[dtype]['type']

            start_tag(doc, 'c', attributes)

            if dtype == 'formula':
                tag(doc, 'f', body = '%s' % cell[1:])
                tag(doc, 'v')
            else:
                tag(doc, 'v', body = '%s' % cell)

            end_tag(doc, 'c')


        end_tag(doc, 'row')

'spans': '1:%d' % max_column}
        if row_dimension.height > 0:
            attrs['ht'] = str(row_dimension.height)
            attrs['customHeight'] = '1'
        start_tag(doc, 'row', attrs)
        row_cells = cells_by_row[row_idx]
        sorted_cells = sorted(row_cells, key = row_sort)
        for cell in sorted_cells:
            value = cell._value
            coordinate = cell.get_coordinate()
            attributes = {'r': coordinate}
            attributes['t'] = cell.data_type
            if coordinate in worksheet._styles:
                attributes['s'] = '%d' % style_id_by_hash[
                        hash(worksheet._styles[coordinate])]
            start_tag(doc, 'c', attributes)
            if value is None:
                tag(doc, 'v', body='')
            elif cell.data_type == cell.TYPE_STRING:
                tag(doc, 'v', body = '%s' % string_table[value])
            elif cell.data_type == cell.TYPE_FORMULA:
                tag(doc, 'f', body = '%s' % value[1:])
                tag(doc, 'v')
            elif cell.data_type == cell.TYPE_NUMERIC:
                tag(doc, 'v', body = '%s' % value)
            else:
                tag(doc, 'v', body = '%s' % value)
            end_tag(doc, 'c')
        end_tag(doc, 'row')
    end_tag(doc, 'sheetData')

def write_worksheet_cols(doc, worksheet):
    """Write worksheet columns to xml."""
    if worksheet.column_dimensions:
        start_tag(doc, 'cols')
        for column_string, columndimension in \
                worksheet.column_dimensions.items():
            col_index = column_index_from_string(column_string)
            col_def = {}
            col_def['collapsed'] = str(columndimension.style_index)
            col_def['min'] = str(col_index)
            col_def['max'] = str(col_index)
            if columndimension.width != \
                    worksheet.default_column_dimension.width:
                col_def['customWidth'] = 'true'
            if not columndimension.visible:
                col_def['hidden'] = 'true'
            if columndimension.outline_level > 0:
                col_def['outlineLevel'] = str(columndimension.outline_level)
            if columndimension.collapsed:
                col_def['collapsed'] = 'true'

def write_header(self):

        doc = self.header

        start_tag(doc, 'worksheet',
                {'xml:space': 'preserve',
                'xmlns': 'http://schemas.openxmlformats.org/spreadsheetml/2006/main',
                'xmlns:r': 'http://schemas.openxmlformats.org/officeDocument/2006/relationships'})
        start_tag(doc, 'sheetPr')
        tag(doc, 'outlinePr',
                {'summaryBelow': '1',
                'summaryRight': '1'})
        end_tag(doc, 'sheetPr')
        tag(doc, 'dimension', {'ref': 'A1:%s' % (self.get_dimensions())})
        start_tag(doc, 'sheetViews')
        start_tag(doc, 'sheetView', {'workbookViewId': '0'})
        tag(doc, 'selection', {'activeCell': 'A1',
                'sqref': 'A1'})
        end_tag(doc, 'sheetView')
        end_tag(doc, 'sheetViews')
        tag(doc, 'sheetFormatPr', {'defaultRowHeight': '15'})
        start_tag(doc, 'sheetData')

def write_worksheet(worksheet, string_table, style_table):
    """Write a worksheet to an xml file."""
    xml_file = StringIO()
    doc = XMLGenerator(xml_file, 'utf-8')
    start_tag(doc, 'worksheet',
            {'xml:space': 'preserve',
            'xmlns': 'http://schemas.openxmlformats.org/spreadsheetml/2006/main',
            'xmlns:r': 'http://schemas.openxmlformats.org/officeDocument/2006/relationships'})
    start_tag(doc, 'sheetPr')
    tag(doc, 'outlinePr',
            {'summaryBelow': '%d' % (worksheet.show_summary_below),
            'summaryRight': '%d' % (worksheet.show_summary_right)})
    end_tag(doc, 'sheetPr')
    tag(doc, 'dimension', {'ref': '%s' % worksheet.calculate_dimension()})
    write_worksheet_sheetviews(doc, worksheet)
    tag(doc, 'sheetFormatPr', {'defaultRowHeight': '15'})
    write_worksheet_cols(doc, worksheet)
    write_worksheet_data(doc, worksheet, string_table, style_table)
    if worksheet.auto_filter:
        tag(doc, 'autoFilter', {'ref': worksheet.auto_filter})
    write_worksheet_hyperlinks(doc, worksheet)

def write_worksheet_hyperlinks(doc, worksheet):
    """Write worksheet hyperlinks to xml."""
    write_hyperlinks = False
    for cell in worksheet.get_cell_collection():
        if cell.hyperlink_rel_id is not None:
            write_hyperlinks = True
            break
    if write_hyperlinks:
        start_tag(doc, 'hyperlinks')
        for cell in worksheet.get_cell_collection():
            if cell.hyperlink_rel_id is not None:
                attrs = {'display': cell.hyperlink,
                        'ref': cell.get_coordinate(),
                        'r:id': cell.hyperlink_rel_id}
                tag(doc, 'hyperlink', attrs)
        end_tag(doc, 'hyperlinks')

def write_worksheet_sheetviews(doc, worksheet):
    start_tag(doc, 'sheetViews')
    start_tag(doc, 'sheetView', {'workbookViewId': '0'})
    selectionAttrs = {}
    topLeftCell = worksheet.freeze_panes
    if topLeftCell:
        colName, row = coordinate_from_string(topLeftCell)
        column = column_index_from_string(colName)
        pane = 'topRight'
        paneAttrs = {}
        if column > 1:
            paneAttrs['xSplit'] = str(column - 1)
        if row > 1:
            paneAttrs['ySplit'] = str(row - 1)
            pane = 'bottomLeft'
            if column > 1:
                pane = 'bottomRight'
        paneAttrs.update(dict(topLeftCell=topLeftCell,

def write_worksheet_sheetviews(doc, worksheet):
    start_tag(doc, 'sheetViews')
    start_tag(doc, 'sheetView', {'workbookViewId': '0'})
    selectionAttrs = {}
    topLeftCell = worksheet.freeze_panes
    if topLeftCell:
        colName, row = coordinate_from_string(topLeftCell)
        column = column_index_from_string(colName)
        pane = 'topRight'
        paneAttrs = {}
        if column > 1:
            paneAttrs['xSplit'] = str(column - 1)
        if row > 1:
            paneAttrs['ySplit'] = str(row - 1)
            pane = 'bottomLeft'
            if column > 1:
                pane = 'bottomRight'
        paneAttrs.update(dict(topLeftCell=topLeftCell,
                              activePane=pane,

def write_string_table(string_table):
    """Write the string table xml."""
    temp_buffer = StringIO()
    doc = XMLGenerator(temp_buffer, 'utf-8')
    start_tag(doc, 'sst', {'xmlns':
            'http://schemas.openxmlformats.org/spreadsheetml/2006/main',
            'uniqueCount': '%d' % len(string_table)})
    strings_to_write = sorted(string_table.items(),
            key=lambda pair: pair[1])
    for key in [pair[0] for pair in strings_to_write]:
        start_tag(doc, 'si')
        if key.strip() != key:
            attr = {'xml:space': 'preserve'}
        else:
            attr = {}
        tag(doc, 't', attr, key)
        end_tag(doc, 'si')
    end_tag(doc, 'sst')
    string_table_xml = temp_buffer.getvalue()
    temp_buffer.close()
    return string_table_xml

def write_header(self):

        doc = self.header

        start_tag(doc, 'worksheet',
                {'xml:space': 'preserve',
                'xmlns': 'http://schemas.openxmlformats.org/spreadsheetml/2006/main',
                'xmlns:r': 'http://schemas.openxmlformats.org/officeDocument/2006/relationships'})
        start_tag(doc, 'sheetPr')
        tag(doc, 'outlinePr',
                {'summaryBelow': '1',
                'summaryRight': '1'})
        end_tag(doc, 'sheetPr')
        tag(doc, 'dimension', {'ref': 'A1:%s' % (self.get_dimensions())})
        start_tag(doc, 'sheetViews')
        start_tag(doc, 'sheetView', {'workbookViewId': '0'})
        tag(doc, 'selection', {'activeCell': 'A1',
                'sqref': 'A1'})
        end_tag(doc, 'sheetView')
        end_tag(doc, 'sheetViews')
        tag(doc, 'sheetFormatPr', {'defaultRowHeight': '15'})