pan> <span class="n">cfs_df</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
                    <span class="n">cfs_df</span> <span class="o">=</span> <span class="n">rows_to_add</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span>
                <span class="k">else</span><span class="p">:</span>
                    <span class="n">cfs_df</span> <span class="o">=</span> <span class="n">pd</span><span class="o">.</span><span class="n">con