Saving numpy array to json

Question

Im trying to save a numpy array to a json but since a ndarray is not JSON serializable I am converting them to lists. My problem is that this consumes an excesive amount of RAM. Is there any other lightweight method?

Answer 1

You can use numpyencoder :

import numpy as np
import json
from numpyencoder import NumpyEncoder

numpy_data = np.array([0, 1, 2, 3])

print(json.dumps(numpy_data, cls=NumpyEncoder))