lass="p">(</span><span class="n">Poisson</span><span class="p">(</span><span class="n">rate</span><span class="o">=</span><span class="n">nu</span><span class="o">*</span><span class="bp">self</span><span class="o">.</span><span class="n">tau</span><span class="o">*</span><span class="bp">self</span><span class="o">.</span><span class="n">b</span><span class="p">)</span><span class="o">.</span><span class="n">sample</span><span class="p">(</span><span class="n">sample_shape</span><span class="o">=</span><sp