Python, get dictionary, nested dictionary, nested list keys

Question

I am trying to get all keys from a json file in Python. How to get nested second level(x,y) and third level keys(a,b). For example, Keys: results,x,y,a,b

Code:

#open data
import json

with open('list.json') as f:
    my_dict = json.load(f)

#1
    #find keys
    for key in my_dict.keys():
         print("Keys : {}".format(key))

Json:

{
   "results":[
      {
         "x":5
      },
      {
         "x":5,
         "y":[
            1,
            2,
            3
         ]
      },
      {
         "x":5,
         "y":{
            "a":2,
            "b":67
         }
      }
   ]
}

Output:

Keys : results

Rustam Garayev · Answer 1 · 2021-02-06T16:26:09.047

0

Use recursive function to return all nested keys. Here is the reference stackoverflow page.

import json

def recursive_items(dictionary):
    for key, value in dictionary.items():
        if type(value) is list:
            for i in value:
                if type(i) is dict:
                    yield from recursive_items(i)
        else:
            yield key

with open('list.json') as f:
    my_dict = json.load(f)

    #find keys
    for key in recursive_items(my_dict):
         print("Keys : {}".format(key))

edited Feb 06 '21 at 16:26

answered Feb 06 '21 at 16:09

Rustam Garayev

2,632
1
9
13

I still get only the "results" key – NoemonGR Feb 06 '21 at 16:17
I see, since the value of 'results' key in your dictionary is list, the above code will not work properly. @NoemonGR edited answers, check it out now. – Rustam Garayev Feb 06 '21 at 16:23

score 0 · Answer 2 · answered Feb 06 '21 at 16:09

0

You need to get the keys which are a part of the value of the JSON.

You therefore need to iterate over the values of my_dict not the keys.

answered Feb 06 '21 at 16:09

pykam

1,223
6
16

with value I get everything Output: (results[{'x': 5}, {'x': 5, 'y': [1, 2, 3]}, {'x': 5, 'y': {'a': 2, 'b': 67}}]) – NoemonGR Feb 06 '21 at 16:15

Python, get dictionary, nested dictionary, nested list keys

2 Answers2