ass="bp">self</span><span class="o">.</span><span class="n">_decisiontree</span><span class="o">.</span><span class="n">evaluate</span><span class="p">()</span>
            <span class="bp">self</span><span class="o">.</span><span class="n">_decisiontree</span><span class="o">.</span><span class="n">rollback</span><span class="p">()</span>
            <span class="n">expvals</span> <span class="o">=</span> <span class="p">[</span>
                <span class="bp">self</span><span class="o">.</span><span cla