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Andrés Baamonde Lozano
Andrés Baamonde Lozano

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Nested json to python object

#json #python #nested #object

Today i was creating a configuration file, in the past, i accessed configuration as a dictionary, but this time, i think about changing that. The follwing code creates dynamic attributes with the objects keys recursively.

But first, i'll show the json object:

{ "key": "value", "list": [ "a", "b", "c", 1, { "key": 1 } ], "object": { "key": { "key": 1 } } }
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On the conversion we have 3 cases:

  • lists
  • dicts (new object)
  • bool, int, float and str 
import json class AppConfiguration(object): def __init__(self, data=None): if data is None: with open("cfg.json") as fh: data = json.loads(fh.read()) else: data = dict(data) for key, val in data.items(): setattr(self, key, self.compute_attr_value(val)) def compute_attr_value(self, value): if type(value) is list: return [self.compute_attr_value(x) for x in value] elif type(value) is dict: return AppConfiguration(value) else: return value
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Now the key, value pairs are attributes - objects.

instance = AppConfiguration() >>>instance.key 'value' >>>instance.list[4].key 1 >>> instance.object.key.key 1
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ouzkagan profile image
ouzkagan •

how can i create json file like your example from scratch in python