Most hacker types don’t mind a command line interface, but very few ordinary users appreciate them. However, if you write command line programs in Python, Gooey can help.

Open your Python program in your editor of choice. Go to the section of your code where you want to invoke the Windows command prompt application.

On Mac OS or Linux, enter python in the command line to run the interactive Python interpreter. On Windows, open Command Prompt and enter py.

The py launcher—or just py for short—is a shortcut to all the installed versions of Python on your system. With a command-line switch, you can see at a glance all the Python interpreters you ...