_getitem__()</tt> method.
          </dd>
        </dl>
        <dl>
          <dt>
            <b><a name="l2h-132"><tt class=
            "method">__iter__</tt></a></b>(<var>self</var>)
          </dt>
          <dd>
            This method is called when an iterator is required for a
            container. This method should return a new iterator object that
            can iterate over all the objects in the container. For mappings,
            it should iterate over the keys of the container, and shoul