f</span> <span class="n">num_features_to_vary</span> <span class="o">&gt;=</span> <span class="mi">2</span> <span class="ow">and</span> <span class="nb">len</span><span class="p">(</span><span class="n">cfs_df</span><span class="p">)</span> <span class="o">&gt;=</span> <span class="n">total_CFs</span><span class="p">:</span>
                    <span class="k">break</span>

        <span class="bp">self</span><span class="o">.</span><span class="n">total_cfs_found</span> <span class="o">=</span> <span class