span class="n">data</span><span
            class="p">,</span> <span class="n">priority</span><span class="o">=</span><span
            class="n">priority</span><span class="p">)</span>
            <span class="bp">self</span><span class="o">.</span><span class="n">last</span><span class="o">.</span><span
            class="n">suc</span> <span class="o">=</span> <span class="n">node</span>
            <span class="bp">self</span><span class="o">.</span><span class="n">last</span> <span
            class="o"