ss="n">mu</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">poi_prior</span><span class="o">.</span><span class="n">sample</span><span class="p">(</span><span class="n">sample_shape</span><span class="o">=</span><span class="p">(</span><span class="n">size</span><span class="p">,</span> <span class="p">))</span><span class="o">.</span><span class="n">reshape</span><span class="p">(</span><span class="o">-</span><span class="mi">1</span><span class="p">,</spa