<span class="n">ymin</span><span class="p">)</span> <span class="p">:</span> <span class="nb">int</span><span class="p">(</span><span class="n">ymax</span><span class="p">),</span> <span class="nb">int</span><span class="p">(</span><span class="n">xmin</span><span class="p">)</span> <span class="p">:</span> <span class="nb">int</span><span class="p">(</span><span class="n">xmax</span><span class="p">)]</span> <span class="o">=</span> <span class="mi">1</span>
    <span class="k">return</span> <span class="n