s="s1">&#39;source_frame_masses&#39;</span><span class="p">]</span><span class="o">.</span><span class="n">keys</span><span class="p">()</span>  <span class="c1"># type of source_frame_masses priors</span>
<span class="go">dict_keys([&#39;binary_masses_BBH_popI_II_powerlaw_gaussian&#39;, &#39;binary_masses_BBH_popIII_lognormal&#39;, &#39;binary_masses_BBH_primordial_lognormal&#39;, &#39;binary_masses_BNS_bimodal&#39;])</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">priors</span><span class="p">