><span class="n">out</span><span class="p">,</span> <span class="n">ny</span><span class="p">)</span>
            <span class="n">loss</span><span class="o">.</span><span class="n">backward</span><span class="p">()</span>

            <span class="n">eta</span> <span class="o">+=</span> <span class="bp">self</span><span class="o">.</span><span class="n">eps</span> <span class="o">*</span> <span class="n">torch</span><span class="o">.</span><span class="n">sign</span><span class="p">(</span><span class="n