field-name">Parameters:</th><td class="field-body"><strong>item</strong> – (<code class="docutils literal"><span class="pre">tuple</span></code>) pair of: indices or list of indices or (<code class="docutils literal"><span class="pre">numpy.ndarray</span></code>) or (<code class="docutils literal"><span class="pre">slice</span></code>) to address portions of the kernel matrix.</td>
</tr>
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body">(<code class="docutils literal"