How to Open an XLSM File. An XLSM file is a spreadsheet that contains macros written in the Visual Basic for Applications, or VBA, language. Macros enable you to automate repetitive tasks and save ...

How to Open an XLS File in Excel. XLS files are Excel workbook files created in Excel 97 or Excel 2003. The 2007, 2010 and 2013 versions of the program use the XLSX format by default to save ...

You can use Python to dynamically insert, calculate, and update formulas within your Excel worksheets. This is a huge productivity booster when dealing with complex calculations and large datasets.

Interested in learning Python? Jack Wallen takes you through your first steps in building a simple application to take user input and write it to a file.