Describe how to use Sessions for Web python.
Sessions are the server side version of cookies. While a cookie preserves state at the client side, sessions preserves state at server side.
The session state is kept in a file or in a database at the server side. Each session is identified by a unique session id (SID). To make it possible to the client to identify himself to the server the SID must be created by the server and sent to the client whenever the client makes a request.
Session handling is done through the web.session module in the following manner:
import web.session session = web.session.start( option1, Option2,... )
session['myVariable'] = 'It can be requested'
