An example of using the `write_rich_string` function

xlsxwriter_write_rich_string_sample.py

import xlsxwriter

workbook   = xlsxwriter.Workbook('rich_strings.xlsx')

bold   = workbook.add_format({'bold': True})
italic = workbook.add_format({'italic': True})

worksheet.write_rich_string('A1',
                            'This is ',
                            bold, 'bold',
                            ' and this is ',
                            italic, 'italic')