pythonic way to manipulate nested dict from dotted path?

Question

I have a nested dictionary, an encryption function and a dotted path, I want to apply my encryption function to encrypt specific field. Example:

mydict

{"a":{
     ...
     "b":{
          ...
          "c":"value"
           }
      }
 }

field path: a.b.c

I want to execute encryption function on c value and modify my dict. What's the most efficent and pythonic way?

Answer 1

Maybe a little too late and tricky but to be functional:

from functools import reduce

d = {'a': {'b': {'c': 'value'}}}
path = 'a.b.c'

# result will be 'value'
result = reduce(dict.__getitem__, path.split('.'), d)