How to run a python script at reboot? (2 replies)

I am using debian on a dockstar.

Linux dockstar 5.5.1-kirkwood-tld-1 #1.0 PREEMPT Sat Feb 1 22:28:36 PST 2020 armv5tel GNU/Linux

What is the easiest (and clean) way if I want to run a python script at reboot? I have tried editing /etc/rc.local but that did not seem to work.

Thanks.