If you want to read the IP adress at the startup on the Sense Hat's LEDs matrix.
You need to have: _ A Raspberry Pi _ A Sense Hat
For add this programm at the startup of your Raspberry Pi, edit the rc.local file of Raspbian like this :
https://www.raspberrypi.org/documentation/linux/usage/rc-local.md
Use the ip.py and enjoy my modest program.