Library to create spreadsheet files compatible with MS Excel 97/2000/XP/2003 XLS files, on any platform, with Python 2.3 to 2.6 xlwt is a library for generating spreadsheet files that are compatible with Excel 97/2000/XP/2003, OpenOffice.org Calc, and Gnumeric. xlwt has full support for Unicode. Excel spreadsheets can be generated on any platform without needing Excel or a COM server. The only requirement is Python 2.3 to 2.6. xlwt is a fork of pyExcelerator.