Writing to files is an essential Python skill. It lets you save data permanently instead of losing it when your program stops. You can use file saving to store results, logs, reports, user input, ...
CSV stands for Comma Separated Values File is just like a plain file that uses a different approach for structuring data. If you open a csv file in Sublime Text you will find simple plain text ...
CSV files show up in almost every data workflow. Exports from databases, applications, and batch jobs often end up as .csv files, along with problems such as inconsistent delimiters, encoding errors, ...