cat</span><span class="p">([</span><span class="n">cfs_df</span><span class="p">,</span> <span class="n">rows_to_add</span><span class="p">])</span>
                <span class="n">cfs_df</span><span class="o">.</span><span class="n">drop_duplicates</span><span class="p">(</span><span class="n">inplace</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
                <span class="c1"># Always change at least 2 features before stopping</span>
                <span class="k">i