 class="s2">&quot;PAY_1&quot;</span><span class="p">})</span>
<span class="n">old_PAY</span> <span class="o">=</span> <span class="p">[</span><span class="s1">&#39;PAY_3&#39;</span><span class="p">,</span> <span class="s1">&#39;PAY_4&#39;</span><span class="p">,</span> <span class="s1">&#39;PAY_5&#39;</span><span class="p">,</span> <span class="s1">&#39;PAY_6&#39;</span><span class="p">]</span>
<span class="n">data</span><span class="p">[</span><span class="s1">&#39;PAY_old_mean&#39;</span><span class="p">]