="n">graph</span><span class="p">,</span>
                <span class="n">attribute</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span>
                <span class="n">default</span><span class="o">=</span><span class="n">default</span><span class="p">,</span>
            <span class="p">)</span>

        <span class="c1"># Construct the vertex, edge and label drawers</span>
        <span class="n">vertex_drawer</span> <span class="o">=</span> <span class="bp">self</span><span