Declaring a multi dimensional dictionary in python

Question

I need to make a two dimensional dictionary in python. e.g. new_dic[1][2] = 5

When I make new_dic = {}, and try to insert values, I get a <

Answer 1

One simple way is to just use tuples as keys to a regular dictionary. So your example becomes this:

new_dic[(1, 2)] = 5

The downside is that all usages have to be with this slightly awkward convention, but if that's OK, this is all you need.