</span><span class="mi">0</span><span class="p">])</span>
            <span class="n">nsteps</span><span class="o">.</span><span class="n">append</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="n">nftime</span><span class="o">.</span><span class="n">append</span><span class="p">(</span>