Numpy array to base64 back and forth (including JSON serialization)

np_arr-b64.py

import numpy as np
import base64
import json

def without_serialization(arr):
    b64_bytes = base64.b64encode(arr)
    bytes_for_np = base64.decodebytes(b64_bytes)

    arr_back = np.frombuffer(bytes_for_np, dtype=np.float32)

    assert np.allclose(arr, arr_back)

def with_serialization(arr):
    b64_bytes = base64.b64encode(arr)
    np_bytes_for_json = b64_bytes.decode("ascii")

    # test serialization
    try:
        json.dumps(b64_bytes)
    except TypeError:
        pass
    json.dumps(np_bytes_for_json)

    bytes_for_np = base64.b64decode(np_bytes_for_json)
    arr_back = np.frombuffer(bytes_for_np, dtype=arr.dtype)

    assert np.allclose(arr, arr_back)

arr = np.array([.0003248340023408243, .2500005235235], dtype=np.float32)
without_serialization(arr)
with_serialization(arr)