Recursively set object attributes from dict

Question

My question is relatively simple: How do I recursively set object attributes matching the key-value pairs of a dictionary?

For example, given this dict:

my_dict = {
    "number": 0,
    "thing": True,
    "foo": {
        "bar": {
            "thing": "string"
        }
    }
}

I want to make an object with its keys as attributes, recursively:

>>> my_obj = some_method(my_dict)
>>> my_obj.number
0
>>> my_obj.foo.bar
{"thing": "string"}
>>> my_obj.foo.bar.thing
"string"

Dictionary elements are accessed using indexing, not as attributes. — Barmar, Jan 27 '21 at 18:34
See [What is the best way to implement nested dictionaries?](https://stackoverflow.com/questions/635483/what-is-the-best-way-to-implement-nested-dictionaries) — martineau, Jan 27 '21 at 18:39
@Jab yes, https://stackoverflow.com/a/32107024/13837757 works quite nicely, I was just thinking the answer could be simplified to a function. — frissyn, Jan 27 '21 at 18:40
Also see [Accessing dict keys like an attribute?](https://stackoverflow.com/questions/4984647/accessing-dict-keys-like-an-attribute) — martineau, Jan 27 '21 at 18:41

score 3 · Answer 1 · answered Jan 27 '21 at 18:37

3

https://github.com/Infinidat/munch

This library is meant to provide attribute style access to dictionaries.

For example:

>>> from bunch import bunchify
>>> d = {'a': 1, 'b': {'c': 2}, 'd': ["hi", {'foo': "bar"}]}
>>> x = bunchify(d)
>>> x.a
1
>>> x.b.c
2
>>> x.d[1].foo
'bar'

answered Jan 27 '21 at 18:37

Tarek Ahmed

148
9

Of course there's a library for this kind of thing, just couldn't find it with a Google search, thanks! – frissyn Jan 27 '21 at 18:47
Are you being sarcastic? – Tarek Ahmed Feb 08 '21 at 12:55
Do you want me to say I was being sarcastic? No, right? Then no, I wasn't being sarcastic. – frissyn Feb 08 '21 at 15:00

score 2 · Accepted Answer · answered Jan 27 '21 at 19:04

Another way using builtin libs:

import json
from types import SimpleNamespace

my_dict = {
    "number": 0,
    "thing": True,
    "foo": {
        "bar": {
            "thing": "string"
        }
    }
}

dumped_data = json.dumps(my_dict)
result = json.loads(dumped_data, object_hook=lambda x: SimpleNamespace(**x))

result.number

>> 0

result.foo.bar.thing

>> string

Recursively set object attributes from dict

2 Answers2