ass="n">key</span> <span class="o">=</span> <span class="mi">0</span>
        <span class="k">else</span><span class="p">:</span>
            <span class="n">key</span> <span class="o">=</span> <span class="nb">max</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">labels</span><span class="o">.</span><span class="n">keys</span><span class="p">())</span>
        <span class="k">for</span> <span class="n">i</span><span class="p">,</span><span class="n">v</span> 