Im trying to implement paypal with Django using paypalrestsdk.
I followed the code example from the example here: https://prettyprinted.com/blog/1125955/creating-paypal-express-payments-in-flask
But there is this error:

here are my code snippets of template .html, views.py and urls.py https://gist.github.com/axilaris/1e6e34ba5915abceb0dbd06d46baf08b
here is template code that shows the button:
<div id="paypal-button"></div>
<script src="https://www.paypalobjects.com/api/checkout.js"></script>
<script>
    var CREATE_PAYMENT_URL  = 'http://127.0.0.1:8000/payment_create';
    var EXECUTE_PAYMENT_URL = 'http://127.0.0.1:8000/payment_execute';                        
    paypal.Button.render({
        env: 'sandbox', // Or 'sandbox'
        commit: true, // Show a 'Pay Now' button
        payment: function() {
            console.log("payment function")
            return paypal.request.post(CREATE_PAYMENT_URL).then(function(data) {
                console.log("return create payment")
                return data.paymentID;
            });
        },
        onAuthorize: function(data) {
            return paypal.request.post(EXECUTE_PAYMENT_URL, {
                paymentID: data.paymentID,
                payerID:   data.payerID
            }).then(function(res) {
                console.log(res.success)
                // The payment is complete!
                // You can now show a confirmation message to the customer
            });
        }
    }, '#paypal-button');
</script>     
What is the problem, how to fix it and what is ppxo_unhandled_error ?
Alternatively, whats the best way to implement paypal properly on Django. (I'm just not seeing any good docs on this)
Django==1.11.7
 
     
     
     
    