n class="k">if</span> <span class="n">less_than</span> \
            <span class="k">else</span> <span class="mi">1</span> <span class="o">-</span> <span class="n">invgamma</span><span class="o">.</span><span class="n">cdf</span><span class="p">(</span><span class="n">cutoff</span><span class="p">,</span> <span class="n">a</span><span class="o">=</span><span class="n">alpha_post</span><span class="p">,</span> <span class="n">scale</span><span class="o">=</span><span class="n">beta_post</span><span class="p"