n">Set</span><span class="p">[</span><span class="nb">int</span><span class="p">]]</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="nb">set</span><span class="p">)</span>
        <span class="k">for</span> <span class="n">protein_key</span><span class="p">,</span> <span class="n">residue_index</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">shapemer_to_protein_indices</span><span class="p">[</span><sp