an><span class="p">)</span>
                            <span class="n">quantities</span> <span class="o">=</span> <span class="n">parts</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_sep</span><span class="p">)</span>
                            <span class="bp">self</span><span class="o">.</span><span class="n">_ts</span><span clas