</span> <span class="ow">not</span> <span class="kc">None</span> <span class="ow">and</span> <span class="s1">&#39;data_df&#39;</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">data_interface</span><span class="o">.</span><span class="vm">__dict__</span><span class="p">:</span>
            <span class="n">final_cfs_df_sparse</span> <span class="o">=</span> <span class="n">final_cfs_df</span><span class="o">.</span><span class="n">copy</span><span class="p