/span><span class="sd">&quot;&quot;&quot;</span>
<span class="sd">    Assigns 50/50 train/test split to adata by adding &#39;is_training&#39; column</span>
<span class="sd">    </span>
<span class="sd">    Parameters</span>
<span class="sd">    -----------</span>
<span class="sd">    adata</span>
<span class="sd">        AnnData object</span>

<span class="sd">    random_state</span>
<span class="sd">        Random seed for reproducibility</span>

<span class="sd">    Returns</span>
<span class="sd">    ---