My device is 'Raspberry pi 3 model B' and I want to use GPIO + Python coding to do that.
I found somethings in web but did not work for me (I guess because those methods were for raspberry 2) !
Is there a clear solution (using GPIO + python) for raspberry pi 3 model B to add a shutdown button?

For my project, I need a video looper and I found it here: https://learn.adafruit.com/raspberry-pi-video-looper/installation It works fine, and to turn off the system I remove the power cable. But in the above method, they mentioned that you need to connect to raspi board with ssh to shut down the b...