the <code class="highlighter-rouge">cmd</code> window and restart another <code class="highlighter-rouge">cmd</code> window.
        <div class="language-python highlighter-rouge"><div class="highlight"><pre class="highlight"><code>  <span class="c1">#here I downloaded 'graphviz' in C:\Users\dell\Desktop
</span>  <span class="o">&gt;&gt;&gt;</span><span class="kn">import</span> <span class="nn">os</span>
  <span class="o">&gt;&gt;&gt;</span><span class="n">graphviz_setup</span><span class="o">=</span><span 