How to insert/create json variables in Python?

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Hi have a requirement to insert new values when needed in JSON file.
I used to get the new data and need to insert existing json file. If "Honda", "toyota" doesn't exists, need to create and insert new values. If exists need to add new values under respective fields.

sample json file:

{
	"City": "NYC",
	"Make": [{
		"Honda": [{
			"Model": "Accord",
			"Made": "2009",
			"Mileage": 120000
		}, {
			"Model": "Civic",
			"Made": "2017",
			"port": 12000
		}],


		"Toyota": {
			"Model": "Camry",
			"Made": "2011",
			"Mileage": 18000
		},

		"Kia": {
			"Model": "Telluride ",
			"Made": "2019",
			"Mileage": 11000
		}
	}]
}

Python

sampleDict = json.loads(dict1)
if 'City' in sampleDict:
    if 'Make' in sampleDict('City'):
        <not sure how to insert the data here>

What I have tried:

I am new to python, and could not able to figure it out.

Posted 14-Sep-22 19:05pm

Member 15767953

Updated 15-Sep-22 0:59am

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OriginalGriff · Answer 1 · 2022-09-14T19:30:00

Solution 1

json.loads reads the file into a dictionary: json.loads() in Python - GeeksforGeeks[^]
So all you need to do is add treh new data to that: Python Adding Items in a Dictionary[^]
And save the json back to a file: json.dumps() in Python - GeeksforGeeks[^]

Posted 14-Sep-22 19:30pm

OriginalGriff

Comments

Richard MacCutchan 15-Sep-22 4:16am

The loads and dumps functions are for processing strings; load and dump are for reading/writing files.

Richard MacCutchan · Answer 2 · 2022-09-15T00:59:00

The "Make" item is a list of dictionaries, so you just create a new dictionary with the appropriate keys, and add it to the list. Similarly the "Honda" item is a list of dictionaries, so you can add more models to its list. However, "Toyota" and "Kia" are simple dictionaries rather than lists so you would need to convert them to lists in order to add more models.

You can use the code below to help see the structure of the items:

Python

print('\n   Keys:', sampleDict.keys())
print('\nMake[0]:', sampleDict['Make'][0])
print('\n Toyota:', sampleDict['Make'][0]['Toyota'])