my_dict = {key1:{value1:value2}, key2:{value3:value4}, key3{value5:value6}, key4:{value7:value8}...}
result = []
for key1 in my_dict:
if sum(my_dict[key1].keys() + my_dict[key1].values())==3:
result[key1] = my_dict[key1].keys()[0]
Hope this helps
solved Python – selectively add up values while iterating through dictionary of dictionaries [closed]