var>self, key</var>)
          </dt>
          <dd>
            Called to implement evaluation of
            <code><var>self</var>[<var>key</var>]</code>. For sequence types,
            the accepted keys should be integers and slice
                objects.<a name="l2h-135">&nbsp;</a> Note that the special
                interpretation of negative indexes (if the class wishes to
                emulate a sequence type) is up to the <tt class=
                "method">__getitem__()</tt> method. If <var>ke