By : Shabda Raaj

Paypal has a comprehensive API to use their services programatically. The ExpressCheckout API allows you to get the user's details and then process the payments on your servers. They include a SOAP and NVP API. With NVP you do a GET to the Paypal servers with Url encoded values, get responses in plain text and work with them.

The basic flow for ExpressCheckout is something like this,

1. You make a SetExpressCheckout request to Paypal, passing your credentials and and the amount you want to charge etc.
2. Paypal returns an response with ACK of SUCCESS and token which you need ...

By : Shabda Raaj

Recently I updated a lot of our old apps to be compatible with Django 1.0 and be reusable. Before we go further, let me define a _ Reusable Django App _.

A Django app is reusable if

*  It is app. (That is, it is not a project, and has no settings.py/manage.py.)
* It can be dropped in an existing project, and only places where the project should need editing are `settings.py` `installed_apps` and the projects level `urls.py`.
* It can be used in the project with an arbitrary url prefix.

The updated apps were written initially ...