i">1</span><span class="p">,</span> <span class="n">param</span><span class="o">=</span><span class="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="o">.</span><span class="n">reshape</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">data_dim</span><spa