>(</span><span class="bp">self</span><span class="o">.</span><span class="n">fileName</span><span class="p">,</span><span class="n">compression_type</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_compression_type</span><span class="p">)</span>
        <span class="k">return</span> <span class="n">raw_dataset</span><span class="o">.</span><span class="n">map</span><span class="p">(</span><span class="k">lambda</span> <span class="n">x</span><span class="p">