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    <p>There are plenty of examples in the <a href="http://twistedmatrix.com/documents/current/core/howto/" rel="nofollow">documentation of twisted</a>. If you prefer a quick <a href="http://jcalderone.livejournal.com/53465.html" rel="nofollow">summary on how to use sessions</a>.</p> <pre><code>from twisted.web.resource import Resource class ShowSession(Resource): def render_GET(self, request): return 'Your session id is: ' + request.getSession().uid class ExpireSession(Resource): def render_GET(self, request): request.getSession().expire() return 'Your session has been expired.' resource = ShowSession() resource.putChild("expire", ExpireSession()) </code></pre> <p>Do not forget that request.getsession() will create the session if it doesn't already exists. This tutorial explains <a href="http://jcalderone.livejournal.com/53680.html" rel="nofollow">how to store objects in session</a>.</p> <pre><code>cache() from zope.interface import Interface, Attribute, implements from twisted.python.components import registerAdapter from twisted.web.server import Session from twisted.web.resource import Resource class ICounter(Interface): value = Attribute("An int value which counts up once per page view.") class Counter(object): implements(ICounter) def __init__(self, session): self.value = 0 registerAdapter(Counter, Session, ICounter) class CounterResource(Resource): def render_GET(self, request): session = request.getSession() counter = ICounter(session) counter.value += 1 return "Visit #%d for you!" % (counter.value,) resource = CounterResource() </code></pre>
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    2. CO@ManuMora, Twisted (Zope) [Interfaces & Adapters](http://twistedmatrix.com/documents/current/core/howto/components.html) are confusing at first, but are in common use so it's helpful to have an understanding of how they work. The reason that you can store persistent data in the adapter here is that `Session` subclasses [Componentized](http://twistedmatrix.com/documents/current/api/twisted.python.components.Componentized.html)
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      1. USPeter Gibson
 

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