an><span class="p">()</span> <span class="o">/</span> <span class="s1">&#39;cora&#39;</span><span class="p">)</span><span class="o">.</span><span class="n">exists</span><span class="p">():</span>
<span class="lineno">58</span>            <span class="n">download</span><span class="o">.</span><span class="n">download_file</span><span class="p">(</span><span class="s1">&#39;https://linqs-data.soe.ucsc.edu/public/lbc/cora.tgz&#39;</span><span class="p">,</span>
<span class="lineno">59</span>                   