ass="s1">&#39;gaussian&#39;</span><span class="p">,</span> <span class="s1">&#39;sinc&#39;</span><span class="p">,</span> <span class="s1">&#39;sincgauss&#39;</span><span class="p">]</span>
        <span class="c1"># Initialize (default SN3 values)</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">delta_x</span> <span class="o">=</span> <span class="mi">2943</span>  <span class="c1"># step size in nanometers</span>
        <span class="bp">self</span><span class="o">.</span>