       <span class="nb">print</span><span class="p">(</span><span class="s1">&#39;Condition error&#39;</span><span class="p">)</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">df</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">df</span><span class="o">.</span><span class="n">drop</span><span class="p">(</span><span class="n">columns</span><span class="o">=</span><span class="s1">&#39;value&#39;</span><span class="p">)</spa