 class="n">floor</span> <span class="o">=</span> <span class="n">g</span><span class="o">.</span><span class="n">op</span><span class="p">(</span><span class="s1">&#39;Floor&#39;</span><span class="p">,</span> <span class="nb">abs</span><span class="p">)</span>
        <span class="n">y</span> <span class="o">=</span> <span class="n">g</span><span class="o">.</span><span class="n">op</span><span class="p">(</span><span class="s1">&#39;Mul&#39;</span><span class="p">,</span> <span class="n">sign</span><span 