Awkward

import awkward as ak

items = [

    {"id": {"S": "0"}, "nm": {"S": "John Doe"}, "ag": {"N": "30"}},

    {"id": {"S": "1"}, "nm": {"S": "Jill Doe"}, "ag": {"N": "31"}},

]

ak_array = ak.Array(items)

ak.to_dataframe(ak_array)