Inserting new json dictionary object in json file

Question

I have a dictionary which looks like below:

{

"permutations": [

     {
        "testname": "test1",
        "file_type": "text",
        "app_parent_folder": "folder",
        "expected_result": "block"
     },
     {
        "testname": "test2",
        "file_type": "text",
        "app_parent_folder": "folder",
        "expected_result": "block"
     }
    ]
}

I want to add a new object "rule_id": (no. of test cases) such that the json looks like below after the modification

 {

"permutations": [
 {
    "testname": "test1",
    "file_type": "text",
    "app_parent_folder": "folder",
    "expected_result": "block",
    "rule_id": "1"
 },
 {
    "testname": "test2",
    "file_type": "text",
    "app_parent_folder": "folder",
    "expected_result": "block",
    "rule_id": "2"
 }
    ]
}

I tried using the below code but not getting the desired results

import json
from pprint import pprint

with open('example.json') as data_file:
    data = json.load(data_file)

for rule_id_num in range(1,2):
    data["permutations"].append('rule_id':rule_id_num)
pprint(data)

Please can someone help me regarding how can I add the dictionary in the above json file. Thank you in advance!!

not getting the desired results - a good question tells us what happened. I assume you got a syntax error, but don't make me guess! — tdelaney
– tdelaney, Commented Nov 2, 2016 at 1:46

Vasili Syrakis · Accepted Answer · 2016-11-02 00:49:45Z

3

Since the containers you're adding the rule_id to are dictionaries, you can't append to them. You have to add the value by key.

Try this:

import json
from pprint import pprint

with open('example.json') as data_file:
    data = json.load(data_file)

for index, d in enumerate(data['permutations'], 1):
    d['rule_id'] = str(index)

pprint(data)

One thing I have to ask, is there some relation between the testname and the rule_id?

edited Nov 2, 2016 at 0:49

answered Nov 2, 2016 at 0:44

Vasili Syrakis

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1 Comment

idjaw Over a year ago

Note: You can give enumerate a starting number: enumerate(data['permutations'], 1). Saves you that index + 1.

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