from __future__ import print_function

import os

import stripe
from flask import Flask, request

stripe.api_key = os.environ.get('STRIPE_SECRET_KEY')
webhook_secret = os.environ.get('WEBHOOK_SECRET')

app = Flask(__name__)


@app.route('/webhooks', methods=['POST'])
def webhooks():
    payload = request.data
    received_sig = request.headers.get('Stripe-Signature', None)

    try:
        event = stripe.Webhook.construct_event(
            payload, received_sig, webhook_secret)
    except ValueError:
        print("Error while decoding event!")
        return 'Bad payload', 400
    except stripe.error.SignatureVerificationError:
        print("Invalid signature!")
        return 'Bad signature', 400

    print("Received event: id={id}, type={type}".format(
        id=event.id, type=event.type))

    return '', 200


if __name__ == '__main__':
    app.run(port=int(os.environ.get('PORT', 5000)))

from __future__ import print_function

import os

import stripe
from flask import Flask, request

stripe.api_key = os.environ.get('STRIPE_SECRET_KEY')
webhook_secret = os.environ.get('WEBHOOK_SECRET')

app = Flask(__name__)


@app.route('/webhooks', methods=['POST'])
def webhooks():
    payload = request.data.decode('utf-8')
    received_sig = request.headers.get('Stripe-Signature', None)

    try:
        event = stripe.Webhook.construct_event(
            payload, received_sig, webhook_secret)
    except ValueError:
        print("Error while decoding event!")
        return 'Bad payload', 400
    except stripe.error.SignatureVerificationError:
        print("Invalid signature!")
        return 'Bad signature', 400

    print("Received event: id={id}, type={type}".format(
        id=event.id, type=event.type))

    return '', 200


if __name__ == '__main__':
    app.run(port=int(os.environ.get('PORT', 5000)))

Fix example for Python 3 compatibility