               <span class="n">old_percent</span> <span class="o">=</span> <span class="n">current_percent</span>
                        <span class="nb">print</span><span class="p">(</span><span class="s2">&quot;Process </span><span class="si">{0}</span><span class="s2">: </span><span class="si">{1:.1f}</span><span class="s2"> %&quot;</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">index</span><span class="p">,</span> <span class="n">current_percent</span