="sd">    &quot;&quot;&quot;</span>

    <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span>
        <span class="bp">self</span><span class="p">,</span>
        <span class="n">num_gpus</span><span class="p">:</span> <span class="nb">int</span><span class="p">,</span>
        <span class="n">backend</span><span class="p">:</span> <span class="nb">str</span><span class="p">,</span>
        <span class="n">custom_policies</span><span class="p">:</span> <span class="n">Union</s