w"> </span><span class="nn">sklearn.model_selection</span><span class="w"> </span><span class="kn">import</span> <span class="n">train_test_split</span>
    <span class="n">train_mask</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">full</span><span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="n">adata</span><span class="p">),</span> <span class="s2">&quot;destination&quot;</span><span class="p">,</span> <span class="n">dty