converts a nested dictionary to a flattened version of dictionary, uses recursion

flatten_dictionary.py

def json_flat_dict(da):
    v = {}
    for i in da:
        if type(da[i]) == dict:
            g = json_flat_dict(da[i])
            for j in g:
                v[i + '__' + j] = g[j]
        else:
            v[i] = da[i]
    return v

  
json_flat_dict({
    "id": 2,
    "name": "Ervin Howell",
    "username": "Antonette",
    "email": "Shanna@melissa.tv",
    "address": {
      "street": "Victor Plains",
      "suite": "Suite 879",
      "city": "Wisokyburgh",
      "zipcode": "90566-7771",
      "geo": {
        "lat": "-43.9509",
        "lng": "-34.4618"
      }
    },
    "phone": "010-692-6593 x09125",
    "website": "anastasia.net",
    "company": {
      "name": "Deckow-Crist",
      "catchPhrase": "Proactive didactic contingency",
      "bs": "synergize scalable supply-chains"
    }
  })