Flask JSON numpy Encoder to work with Flask when using Numpy and Timestamp data

FlaskPandasNumpyCustomJSONEncoder.py

import json
import numpy as np
from flask import jsonify
from datetime import datetime, timedelta

class CustomJSONEncoder(json.JSONEncoder):
    def default(self, o):
        if isinstance(o, np.ndarray): return o.tolist()
        if isinstance(o, np.int64): return int(o)
        if isinstance(o, set): return list(o)
        if isinstance(o, (datetime, datetime.date, datetime.time)): return o.isoformat()
        elif isinstance(o, timedelta): return (datetime.min + o).time().isoformat()

        return json.JSONEncoder.default(self, o)

# here assuming the Flask App is called app
app.json_encoder = CustomJSONEncoder