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Class wrapper for dictionary objects.</TITLE>
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<H1><A NAME="SECTION005300000000000000000">
3.3 <tt class=module>UserDict</tt> --
         Class wrapper for dictionary objects.</A>
</H1>

<P>

<P>
This module defines a class that acts as a wrapper around
dictionary objects.  It is a useful base class for
your own dictionary-like classes, which can inherit from
them and override existing methods or add new ones.  In this way one
can add new behaviours to dictionaries.

<P>
The <tt class=module>UserDict</tt> module defines the <tt class=class>UserDict</tt> class:

<P>
<dl><dt><b><a name="l2h-322"><tt class=class>UserDict</tt></a></b> ()
<dd>
Return a class instance that simulates a dictionary.  The instance's
contents are kept in a regular dictionary, which is accessible via the
<tt class=member>data</tt> attribute of <tt class=class>UserDict</tt> instances.
</dl>

<P>
<dl><dt><b><a name="l2h-323"><tt class=member>data</tt></a></b>
<dd>
A real dictionary used to store the contents of the <tt class=class>UserDict</tt>
class.
</dl>

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