         "function">len()</tt><a name="l2h-134">&nbsp;</a> Should return

            the length of the object, an integer <code>&gt;=</code> 0. Also,

            an object that doesn't define a <tt class=

            "method">__nonzero__()</tt> method and whose <tt class=

            "method">__len__()</tt> method returns zero is considered to be

            false in a Boolean context. <a name="l2h-128">&nbsp;</a>

          </dd>

        </dl>

        <dl>

          <dt>

            <b><