span class="key">assert</span> <span class="nam">len</span><span class="op">(</span><span class="nam">maze</span><span class="op">.</span><span class="nam">solution</span><span class="op">[</span><span class="num">0</span><span class="op">]</span><span class="op">)</span> <span class="op">==</span> <span class="num">2</span>&nbsp;</span><span class="r"></span></p>
    <p class="run"><span class="n"><a id="t44" href="#t44">44</a></span><span class="t">        <span class="key">assert</span> <span class="nam"