How to persist a data structure to a file in python?

Let's say I have something like this:

d = { "abc" : [1, 2, 3], "qwerty" : [4,5,6] }

What's the correct way to progammatically get that into a file that I can load from python later?

Can I somehow save it as python source (from within a python script, not manually!), then import it later?

Or should I use JSON or something?