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!

When you install Python packages into a given instance of Python, the default behavior is for the package’s files to be copied into the target installation. But sometimes you don’t want to ...

Simply create a new .py file in the same folder as your main Python code. Then “import” that file as you now know how to do, then access the functions from within that module.

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.

The newly approved Python Enhancement Proposal 751 gives Python a standard lock file format for specifying the dependencies of projects. Here’s the what, why, and when.