/span> <span class="n">grid</span><span class="p">()</span>
<span class="n">grid_ph_g</span><span class="o">.</span><span class="n">read</span><span class="p">(</span><span class="n">data</span><span class="p">)</span>  <span class="c1"># Load data</span>
<span class="n">grid_ph_g</span><span class="o">.</span><span class="n">pf</span><span class="p">()</span>  <span class="c1"># solve power flow</span>
<span class="n">p</span><span class="o">=</span><span class="n">plot_results</span><span class="p">(</spa