ample_paths</span> <span class="o">=</span> <span class="p">{</span><span class="n">key</span><span class="p">:</span> <span class="p">[]</span> <span class="k">for</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">classes</span><span class="p">}</span>
    <span class="n">shuffle_seed</span> <span class="o">=</span> <span class="n">seed</span> <span class="ow">or</span> <span class="mi">43</span>
    <span class="n">classes</span> <span class="o">=</span> <span class="n">copy</sp