lass="o">&gt;&gt;&gt;</span> <span class="n">Perm</span>
    <span class="n">array</span><span class="p">([</span><span class="o">-</span><span class="mf">0.</span> <span class="p">,</span> <span class="mf">0.8687</span><span class="p">,</span> <span class="mf">0.9468</span><span class="p">])</span>
<span class="o">&gt;&gt;&gt;</span> <span class="n">Pnorm</span>
    <span class="n">array</span><span class="p">([</span> <span class="n">nan</span><span class="p">,</span> <span class="mf">0.8687</span><span c