Pythong Dictionaries

I can't figure out how to do this, I tried recursion but I'm horrible at it. I wouldn't mind trying this out iteratively either, I'm not looking for what's best, I'm just trying to get the job done.

Say I have a dictionary with dictionaries in them, dicts = {'a':{'b':{'c':None}, how would I add a dictionary to it assuming I didn't know how many dictionaries in it was?

dict['g']
dict['g']['o']
dict['g']['o']['o']
Oh if only there were some sort of pattern to this madness