ss="c1"># Define atype based on symbols</span>
    <span class="n">symbols</span> <span class="o">=</span> <span class="n">aslist</span><span class="p">(</span><span class="n">symbols</span><span class="p">)</span>
    <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">symbols</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span>
        <span class="n">atype</span> <span class="o">=</span> <span class="p">[</span