then</span>
            <span class="k">if</span> <span class="n">itercount</span> <span class="o">%</span> <span class="mi">5</span><span class="p">:</span>
                <span class="n">error</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">sum</span><span class="p">((</span><span class="n">u</span> <span class="o">-</span> <span class="n">uprev</span><span class="p">)</span> <span class="o">**</span> <span class="mi">2</span><span class="p">)</span> <span