ass="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">series_len</span><span class="p">,</span> <span class="n">length</span><span class="p">):</span>
        <span class="n">data_X_</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">data_X</span><span class="p">[</span><span class="n">i</span><span class="o">-</span><span class="n">series_len</span><span class="p">:</span><span class="n">i</span><span class="p">,</span> <span