e_arr</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
    <span class="n">uac</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">zeros</span><span class="p">(</span><span class="n">len_arr</span><span class="p">)</span>

    <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">len_arr</span><span class="p">):</span>
        <span class="