Remember that a CSV file is actually just a text document with a fancy formatting. That means that you actually don’t need to use a module if you want to know how to open CSV files in Python!

Pre Python 3.9, we could write something like this to open two (or more) file I/O streams: That first line is pretty long, too long in fact.

Have you ever wished you could edit Python packages installed locally without reinstalling them? Editable installs are the way.

This post explains what a Python module is and how to use it to drastically extend the capabiltiies of your code. Plus: how to make your own!