Qwiic pHAT Extension for Raspberry Pi 400 Hookup Guide
Contributors:
bboyho, 
Elias The Sparkiest
bboyho, Elias The Sparkiest 
GPIO Pins
The Raspberry Pi 400 uses the standard 2x20 GPIO pins. With the help of the Qwiic pHAT extension, the Pi 400's horizontal GPIO pins are rerouted to a vertical position. There are several programming languages available to use on the Raspberry Pi. We recommend Python to control the pins. Check the following tutorials below to get started.
Python Programming Tutorial: Getting Started with the Raspberry Pi
June 27, 2018
This guide will show you how to write programs on your Raspberry Pi using Python to control hardware.
Raspberry gPIo
October 29, 2015
How to use either Python or C++ to drive the I/O lines on a Raspberry Pi.