What is the best way to implement nested dictionaries?

I have a data structure which essentially amounts to a nested dictionary. Let’s say it looks like this: {‘new jersey’: {‘mercer county’: {‘plumbers’: 3, ‘programmers’: 81}, ‘middlesex county’: {‘programmers’: 81, ‘salesmen’: 62}}, ‘new york’: {‘queens county’: {‘plumbers’: 9, ‘salesmen’: 36}}} Now, maintaining and creating this is pretty painful; every time I have a new state/county/profession … Read more