b">list</span><span class="p">(</span><span class="n">stock_test_sample</span><span class="o">.</span><span class="n">df</span><span class="o">.</span><span class="n">keys</span><span class="p">())</span>

        <span class="k">for</span> <span class="n">col</span> <span class="ow">in</span> <span class="n">colNames</span><span class="p">:</span>
            <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="nb">