XLSXLite

This is a lightweight XLSX writer with emphasis on minimizing memory usage. It's also really fast.

from xlsxlite.writer import XLSXBook
book = XLSXBook()
sheet1 = book.add_sheet("People")
sheet1.append_row("Name", "Email", "Age")
sheet1.append_row("Jim", "jim@acme.com", 45)
book.finalize(to_file="simple.xlsx")

Benchmarks

The benchmarking test writes rows with 10 cells of random string data to a single sheet workbook. The table below gives the times in seconds (lower is better) to write a spreadsheet with the given number of rows, and includes xlxswriter and openpyxl for comparison.

Limitations

This library is for projects which need to generate large spreadsheets, quickly, for the purposes of data exchange, and so it intentionally only supports a tiny subset of SpreadsheetML specification:

• No styling or themes
• Only strings, numbers, booleans and dates are supported cell types

If you need to do anything fancier then take a look at xlxswriter and openpyxl.

Development

To run all tests:

uv run pytest xlsxlite -s