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<H1><A NAME="SECTION006800000000000000000"></A><A NAME="pyapi-sess"></A>
<BR>
4.8 <tt class="module">Session</tt> - Session Management
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<A NAME="module-Session"></A>
<P>
The <tt class="module">Session</tt> module provides objects for maintaining persistent
sessions across requests.
<P>
The module contains a <tt class="class">BaseSession</tt> class, which is not meant to
be used directly (it provides no means of storing a session),
<tt class="class">DbmSession</tt> class, which uses a dbm to store sessions, and
<tt class="class">FileSession</tt> class, which uses individual files to store
sessions.
<P>
The <tt class="class">BaseSession</tt> class also provides session locking, both
across processes and threads. For locking it uses APR global_mutexes
(a number of them is pre-created at startup) The mutex number is
computed by using modulus of the session id
<tt class="function">hash()</tt>. (Therefore it's possible that different session
id's will have the same hash, but the only implication is that those
two sessions cannot be locked at the same time resulting in a slight
delay.)
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<span class="release-info">Release 3.3.1, documentation updated on January 29, 2007.</span>
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