TInterpreter</span>
        <span class="n">algo_selector</span> <span class="o">=</span> <span class="kc">None</span>
        <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">lower_setting</span><span class="o">.</span><span class="n">algo_selector</span><span class="p">:</span>
            <span class="n">algo_selector</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">lower_setting</span><span class="o">.</span>