n><span class="op">,</span> <span class="nam">_</span> <span class="op">=</span> <span class="nam">grid</span><span class="op">.</span><span class="nam">shape</span>&nbsp;</span><span class="r"></span></p>
    <p class="mis show_mis"><span class="n"><a id="t34" href="#t34">34</a></span><span class="t">        <span class="key">if</span> <span class="key">not</span> <span class="op">(</span><span class="num">0</span> <span class="op">&lt;=</span> <span class="nam">y</span> <span class="op">&lt;</span> <span 