an><span class="o">.</span><span class="n">deepcopy</span><span class="p">(</span><span class="n">classes</span><span class="p">)</span>
    <span class="n">add_unknown_class</span> <span class="o">=</span> <span class="n">unknown_class_percentage</span> <span class="ow">and</span> <span class="n">unknown_class_label</span> <span class="ow">in</span> <span class="n">classes</span>
    <span class="n">add_empty_class</span> <span class="o">=</span> <span class="n">empty_class_percentage</span> <span class="o