lass="n">torch</span><span class="o">.</span><span class="n">hstack</span><span class="p">((</span><span class="n">mu</span><span class="p">,</span> <span class="n">nu</span><span class="p">)))</span>
        <span class="k">assert</span> <span class="n">samples</span><span class="o">.</span><span class="n">shape</span> <span class="o">==</span> <span class="p">(</span><span class="n">size</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">batch_size</span><sp