><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">map_shapemers_to_indices</span><span class="p">(</span><span class="n">protein_keys</span><span class="p">)</span><span class="o">.</span><span class="n">keys</span><span class="p">()))</span>
        <span class="k">elif</span> <span class="n">protein_keys</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
            <span class="n">protein_keys</span> <span class="o">=</span> <