pan class="n">math</span><span class="o">.</span><span class="n">ceil</span><span class="p">((</span><span class="n">top</span> <span class="o">-</span> <span class="n">bottom</span><span class="p">)</span> <span class="o">/</span> <span class="bp">self</span><span class="o">.</span><span class="n">scale</span> <span class="o">/</span> <span class="n">chunksize</span><span class="p">),</span>
        <span class="p">)</span></div>



<span class="k">def</span> <span class="nf">_execute</span><span class="p"