Is it possible to map a string to a map in Python. For example, if I want a map that looks like:

mymap = { 'ABC': {'123' : 56}, 'DEF': {'456' : 92} }

Is this possible? How would I add a value to the map, or check the map to see what the value is of the 'inner map' if I am doing an iteration when mymap is empty (at the start of a loop, for example). Thanks!