derivatives. Provide</span>
<span class="sd">                either &#39;numerical&#39;, &#39;analytical&#39; or &#39;auto&#39;. If using &#39;auto&#39;,</span>
<span class="sd">                the most efficient available method is automatically chosen.</span>
<span class="sd">            attach (bool): Controls the behaviour of centers defined as</span>
<span class="sd">                atomic indices. If True, the centers tied to an atomic index will</span>
<span class="sd">                move together w