s literal notranslate"><span class="pre">'bell'</span></code>, <code class="docutils literal notranslate"><span class="pre">'triangular'</span></code>, <code class="docutils literal notranslate"><span class="pre">'trapezoidal1'</span></code>, <code class="docutils literal notranslate"><span class="pre">'trapezoidal2'</span></code>, <code class="docutils literal notranslate"><span class="pre">'z_shaped'</span></code>, <code class="docutils literal notranslate"><span class="pre">'gaussian'</span></code>, <cod