# -*- coding: utf-8 -*- import unittest class stackoverflow_question_60276839_test_case(unittest.TestCase): def test_stackoverflow_question_60276839(self): """ https://stackoverflow.com/questions/60276839/merge-list-of-nested-dictionaries """ from benedict import benedict as bdict data_input= [ {'9940542': {'Invalid Adjust(Platform Fee)': '-1.00'}}, {'9940542': {'Invalid Adjust(Media Fee)': '-2.00'}}, {'10315065': {'Invalid Adjust(Platform Fee)': '-1.00'}}, {'10315065': {'Invalid Adjust(Media Fee)': '-3.00'}}, {'11211744': {'Invalid Adjust(Platform Fee)': '-290.00'}}, {'11211744': {'Invalid Adjust(Media Fee)': '-3403.00'}}, {'11309685': {'Invalid Adjust(Platform Fee)': '-57.00'}}, {'11309685': {'Invalid Adjust(Media Fee)': '-670.00'}}, {'12103490': {'Media Fee': '709472.00'}}, {'12103490': {'Platform Fee': '22703.00'}}, {'12103490': {'Invalid Adjust(Platform Fee)': '-30.00'}}, {'12103490': {'TrueView Budget Adjust (Platofrm Fee)': '-301.00'}}, {'12103490': {'Invalid Adjust(Media Fee)': '-348.00'}}, {'12103490': {'TrueView Budget Adjust (Media Fee)': '-9376.00'}}, {'12160150': {'Media Fee': '549173.00'}}, {'12160150': {'Platform Fee': '17573.00'}} ] data_output = bdict() data_output.merge(*data_input) print(data_output.dump()) expected_data_output = { '10315065': { 'Invalid Adjust(Media Fee)': '-3.00', 'Invalid Adjust(Platform Fee)': '-1.00', }, '11211744': { 'Invalid Adjust(Media Fee)': '-3403.00', 'Invalid Adjust(Platform Fee)': '-290.00', }, '11309685': { 'Invalid Adjust(Media Fee)': '-670.00', 'Invalid Adjust(Platform Fee)': '-57.00', }, '12103490': { 'Invalid Adjust(Media Fee)': '-348.00', 'Invalid Adjust(Platform Fee)': '-30.00', 'Media Fee': '709472.00', 'Platform Fee': '22703.00', 'TrueView Budget Adjust (Media Fee)': '-9376.00', 'TrueView Budget Adjust (Platofrm Fee)': '-301.00', }, '12160150': { 'Media Fee': '549173.00', 'Platform Fee': '17573.00', }, '9940542': { 'Invalid Adjust(Media Fee)': '-2.00', 'Invalid Adjust(Platform Fee)': '-1.00', }, } self.assertEqual(data_output, expected_data_output)