ss="k">if</span> <span class="n">group</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">categories</span><span class="p">[</span><span class="n">smiles</span><span class="p">][</span><span class="s2">&quot;groups&quot;</span><span class="p">]:</span>
                        <span class="n">categories</span><span class="p">[</span><span class="n">smiles</span><span class="p">][</span><span class="s2">&quot;groups&quot;</span><span class="p">]</span><span class="o">.</span><span c