><span class="p">()</span>
        <span class="n">normb</span> <span class="o">=</span> <span class="n">b</span><span class="o">.</span><span class="n">norm</span><span class="p">()</span><span class="o">.</span><span class="n">item</span><span class="p">()</span>
        <span class="n">indices</span> <span class="o">=</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"