n">step</span> <span class="o">=</span> <span class="p">[</span><span class="s1">&#39;</span><span class="si">{:0&gt;3}</span><span class="s1">&#39;</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">i</span><span class="p">)</span> <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="n">ilist</span><span class="p">]</span>
        <span class="k">elif</span> <span class="s1">&#39;to&#39;</span> <span class="ow">in</span>