an>
<span class="n">__credit__</span> <span class="o">=</span> <span class="s2">&quot;Peiyuan Yu&quot;</span>


<div class="viewcode-block" id="FunctionalGroupExtractor"><a class="viewcode-back" href="../../../pymatgen.analysis.functional_groups.html#pymatgen.analysis.functional_groups.FunctionalGroupExtractor">[docs]</a><span class="k">class</span> <span class="nc">FunctionalGroupExtractor</span><span class="p">:</span>
    <span class="sd">&quot;&quot;&quot;</span>
<span class="sd">    This class is used 