CODEWITHSUNDEEP
pythonarrayspython-3.xpython-2.7
HeelMega
HeelMega

Reputation: 508

Find if the key and value pair exist in a json

I am trying to see if a key and value pair exist in a JSON in python.

Here is what I have:

{
    "cars": [
        {
            "model": "test"
        },
        {
            "model": "test2"
        }
    ]
}

I have tried this:

jsondata = open("test.json",'r').read() 
fileData = json.loads(jsondata)

if "test" in [cars.model for cars in fileData]:
    print('test')

Any help will be appreciated.

Upvotes: 1

Views: 1752

Answers (2)

Joseph Biju Cadavil
Joseph Biju Cadavil

Reputation: 313

The best way i suggest would be to use dict and exception handling. Whenever a particular key is not found the 'KeyError' exception is raised, which would allow you to do the needful if the key does not exists.

In your case :

jsondata = open("test.json",'r').read() 
fileData = json.loads(jsondata)

try:
  cars = fileData['cars']
except KeyError:
  print("Missing cars key")

Hope it helps!

Upvotes: 3

U13-Forward
U13-Forward

Reputation: 71580

Try this:

if "test" in [cars['model'] for cars in fileData['cars']]:
    print('test')

Update:

print([cars for cars in fileData['cars'] if cars['model']=='test'])

Need to just do a list comprehension

Upvotes: 2

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