Merge nested dictionaries, by nested keys?

Question

I have several dictionaries with different and common keys, plus different and common keys in the nested dictionary. Below is a simplified example, the actual dictionaries have

Answer 1

From your example, looks like you can do something like:

from collections import defaultdict
mydict = defaultdict(dict)
for indict in listofdicts:
    k, v = indict.popitem()
    mydict[k].update(v)