/span><span class="sa">f</span><span class="s2">&quot;This parestimate group does not have attribute with name &#39;</span><span class="si">{</span><span class="n">item</span><span class="si">}</span><span class="s2">&#39;.&quot;</span><span class="p">)</span>

    <span class="k">def</span> <span class="fm">__str__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
        <span class="k">return</span> <span class="nb">str</span><span class="p">(</span><span class="bp">self