This integrates the PayPal for django-shop version 0.9 and above.

for django-shop version 0.10.x:

pip install djangoshop-paypal==0.1.4

for django-shop version 0.10.x:

pip install djangoshop-paypal==0.2.0

In settings.py of the merchant's project:

Add 'shop_paypal' to INSTALLED_APPS.

At PayPal create a business account and apply for the vendor credentials. For a testing account add them as:

SHOP_PAYPAL = {
    'API_ENDPOINT': 'https://api.sandbox.paypal.com',
    'MODE': 'sandbox',
    'CLIENT_ID': '<client-id-as-delivered-by-PayPal>',
    'CLIENT_SECRET': '<client-secret-as-delivered-by-PayPal>',
}

and for production:

SHOP_PAYPAL = {
    'API_ENDPOINT': 'https://api.paypal.com',
    'MODE': 'live',
    'CLIENT_ID': '<client-id-as-delivered-by-PayPal>',
    'CLIENT_SECRET': '<client-secret-as-delivered-by-PayPal>',
}

Add 'shop_paypal.modifiers.PaymentModifier' to the list of SHOP_CART_MODIFIERS.

Add 'shop_paypal.payment.OrderWorkflowMixin' to the list of SHOP_ORDER_WORKFLOWS.

When rendering the payment method form, "PayPal" shall appear in the list of possible payments.

Successful payments are redirected onto the CMS page with the ID shop-order-last. If no such CMS page exists, the URL which resolves to shop-order-last is returned.

If a payment was rejected by PayPal, djangoshop-paypal redirects onto the CMS page with the ID shop-cancel-payment. If no such CMS page exists, the URL which resolves to shop-cancel-payment is returned.