"o">.</span><span class="n">load_and_preprocess_data</span><span class="p">(</span><span class="n">images</span><span class="p">,</span> <span class="n">labels</span><span class="p">)</span>

        <span class="c1"># define main objects</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">child_model</span> <span class="o">=</span> <span class="n">ChildCNN</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">input_shape</span><span