     
            <span class="n">fs</span> <span class="o">=</span> <span class="nb">frozenset</span><span class="p">(</span><span class="n">newKey</span><span class="p">)</span>

            <span class="k">if</span> <span class="n">fs</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">projected_db</span><span class="p">:</span>
                <span class="n">projected_db</span><span class="p">[</span><span class="n">fs</span><span class="p">]</span> <span class="o">=</span> <s