Object of type 'ndarray' is not JSON serializable

python numpy machine-learning flask scikit-learn

Try to convert your ndarray with tolist() method:

prediction = model.predict(np.array(X).tolist()).tolist()return jsonify({'prediction': prediction})

Example with json package:

a = np.array([1,2,3,4,5]).tolist()json.dumps({"prediction": a})

That should output:

'{"prediction": [1, 2, 3, 4, 5]}'

CodeHunter