-param"><span class="n"><span class="pre">preprocess</span></span><span class="p"><span class="pre">:</span></span><span class="w"> </span><span class="n"><a class="reference internal" href="preprocessing.html#ramanspy.preprocessing.Pipeline" title="ramanspy.preprocessing.Pipeline.Pipeline"><span class="pre">Pipeline</span></a></span><span class="w"> </span><span class="o"><span class="pre">=</span></span><span class="w"> </span><span class="default_value"><span class="pre">None</span></span></em><span clas