my_dict = default(dict, {"K": {"k": 2, "x": 1.0}, "S": {"_":1.0, "s":1}, "EH": {"e":1.0}})

defaultdict(<class 'dict'>, {'EH': {'e': 1.0}, 'K': {'k': 0.6666666666666666, 'x': 0.3333333333333333}, 'S': {'_': 0.5, 's': 0.5}})

from collections import defaultdict

my_dict = default(dict, {"K": {"k": 2, "x": 1.0}, "S": {"_":1.0, "s":1}, "EH": {"e":1.0}})

def dict_probability(my_dict):

   return_dict = defaultdict(dict)

   for key, value in my_dict.items():
       for k, v in values.items():

dict_two = defaultdict(dict, {('EH', 't'): {'e': 2}, ('N', 'e'): {'ne': 1, 'n': 2}})