="mi">0</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">valid_cfs_found</span> <span class="o">=</span> <span class="kc">False</span>
        <span class="k">if</span> <span class="n">cfs_df</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</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="mi">0</span><span cla