 class="s1">&#39;target_weight&#39;</span><span class="p">:</span> <span class="p">[</span><span class="mf">0.4</span><span class="p">,</span> <span class="mf">0.4</span><span class="p">,</span> <span class="mf">0.2</span><span class="p">],</span>
     <span class="s1">&#39;identifiers&#39;</span><span class="p">:</span> <span class="p">[[</span><span class="s1">&#39;STOCK_A&#39;</span><span class="p">],</span> <span class="p">[</span><span class="s1">&#39;STOCK_B&#39;</span><span class="p">],</span> <span 