an><span class="p">)</span>
    <span class="n">graph</span><span class="o">.</span><span class="n">add_edge</span><span class="p">(</span><span class="s1">&#39;B&#39;</span><span class="p">,</span> <span class="s1">&#39;C&#39;</span><span class="p">)</span>

    <span class="c1"># Get coordinates of a vertex</span>
    <span class="n">coords</span> <span class="o">=</span> <span class="n">graph</span><span class="o">.</span><span class="n">get_coordinates</span><span class="p">(</span><span class="s1">&#39