an>
<span class="sd">    """</span>

    <span class="k">if</span> <span class="n">dest_dir</span><span class="p">:</span>
        <span class="n">dest_subdir</span> <span class="o">=</span> <span class="kc">None</span>

    <span class="n">sample_dir</span> <span class="o">=</span> <span class="n">download_verify_extract</span><span class="p">(</span>
        <span class="n">url</span><span class="o">=</span><span class="n">DOWNLOAD_URL</span><span class="p">,</span>
        <span class="n">dest_dir</span>