Adding formatting to the XLSX File

import xlsxwriter

# Create a workbook and add a worksheet
workbook = xlsxwriter.Workbook('Expenses02.xlsx')
worksheet = workbook.add_worksheet()

# Add a bold format to use to highlight cells
bold = workbook.add_format({'bold': True})

# Add a number format for cells with money
money = workbook.add_format({'num_format': '$#,##0'})

# Write some data headers
worksheet.write('A1', 'Item', bold)
worksheet.write('B1', 'Cost', bold)

# Some data we want to write to the worksheet
expenses = (
    ['Rent', 1000],
    ['Gas', 100],
    ['Food', 300],
    ['Gym', 50]
)

# Start from the first cell. Rows and columns are zero indexed
row = 1
col = 0

# Iterate over the data and write it out row by row
for item, cost in expenses:
    worksheet.write(row, col, item)
    worksheet.write(row, col + 1, cost, money)
    row += 1

# Write a total using a formula
worksheet.write(row, 0, 'Total', bold)
worksheet.write(row, 1, '=SUM(B1:B4)', money)

workbook.close()

Note

# Add a bold format to use to highlight cells.
bold = workbook.add_format({'bold': True})

# Add a number format for cells with money.
money = workbook.add_format({'num_format': '$#,##0'})

write(row, column, token, [format])