Python list to dictionary of dictionaries' key order [duplicate]

I want to take an list ['a', 'b', 'c'] and I want to use it as the "recursive" indices into a dictionary of dictionaries.

dict = {'a': {'b': {'c': "hello world"}}}

I want to perform the following assignment operation dict['a']['b']['c'] = value

No need for the solution to be 2.x compatible.