adt</span><span class="o">.</span><span class="n">build_adata_dict</span><span class="p">(</span><span class="n">adata</span><span class="p">,</span> <span class="n">strata_keys</span><span class="o">=</span><span class="p">[</span><span class="s1">&#39;tissue&#39;</span><span class="p">])</span>
</pre></div>
</div>
</div>
</div>
</section>
<section id="randomly-split-the-data-into-origin-and-destination-data">
<h3>3. Randomly split the data into <code class="docutils literal notranslate"><span class="pre">