pan> <span class="o">!=</span> <span class="n">price_only</span>

    <span class="c1"># Renames the columns with the name of the time series</span>
    <span class="c1"># Naming pre-processing is done using a dict because of naming convenience</span>
    <span class="c1"># But then moved to DataFrame for further operations</span>
    <span class="n">universe_dict</span> <span class="o">=</span> <span class="n">column_rename</span><span class="p">(</span><span class="n">universe_dict</span><span class="p">)