  </div>
            <p>グラデーションをクリア</p>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">158</span>            <span class="bp">self</span><span class="o">.</span><span class="n">optimizer</span><span class="o">.</span><span class="n">zero_grad</span><span class="p">()</span></pre></div>
        </div>
    </div>
    <div class='section' id='section-45'>
        <div class='docs'>
            <div class='section-link'>
            