This post will show you how to open CSV files in Python using the CSV module. You'll also learn another method + how to write CSV files!

You can open .DAT files that contain text, with text editors, like Notepad, Notepad++, VS Code, etc. But it is not possible to know what contains in a DAT file.

A CSV file is a simple text file that you can open in a wide variety of programs, including any program that works with plain text like the Notepad app.