Libraries are collections of shared code. They're common in Python, where they're also called "modules," but they're also ...

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Once in the Python shell, commands are run as they are typed. This can be quite helpful in diagnosing problems on systems that require unique processing of some sort.

At its simplest, GreatFET is designed to give you an interactive Python shell that controls oodles of IO pins on the board. You run commands and get feedback as fast as you can type them.

You can launch a Python Shell and execute code directly in it as shown below. You can also create Python scripts and run them from the command prompt.