CODEWITHSUNDEEP
pythonjsonflask
Stephen-Njoroge
Stephen-Njoroge

Reputation: 155

Dumping data structure to JSON in Python raises unorderable types str and builtin_function_or_method

I'm trying to call Flask's jsonify on a data structure, but I get TypeError: unorderable types: str() < builtin_function_or_method(). How do I fix this error?

bucketlists = [{
    'id': 1,
    'name': "BucketList1",
    'items': [{
        id: 1,
        'name': "I need to do X",
        'date_created': "2015-08-12 11:57:23",
        'date_modified': "2015-08-12 11:57:23",
        'done': False
    }],
    'date_created': "2015-08-12 11:57:23",
    'date_modified': "2015-08-12 11:57:23",
    'created_by': "1113456"
}]

@app.route('/bucketlists/', methods=['GET'])
def get_bucketlists():
    return jsonify({'bucketlists': bucketlists})

Upvotes: 0

Views: 211

Answers (1)

Moses Koledoye
Moses Koledoye

Reputation: 78554

id is a builtin Python function; jsonify cannot serialize it, you need to wrap the dictionary key with quotes to make it a string:

bucketlists = [{
    'id': 1,
    'name': "BucketList1",
    'items': [{
        'id': 1, # -----> Here
        'name': "I need to do X",
        'date_created': "2015-08-12 11:57:23",
        'date_modified': "2015-08-12 11:57:23",
        'done': False
    }],
    'date_created': "2015-08-12 11:57:23",
    'date_modified': "2015-08-12 11:57:23",
    'created_by': "1113456"
}]

Additionally, you need to add double underscores to access the name of the module :

app = Flask(__name__)

Upvotes: 4

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