span class="o">=</span> <span class="s1">&#39;None&#39;</span><span class="p">,</span><span class="n">linestyle</span> <span class="o">=</span> <span class="s1">&#39;--&#39;</span><span class="p">,</span><span class="n">linewidth</span> <span class="o">=</span> <span class="mf">0.75</span><span class="p">,</span> <span class="n">markersize</span> <span class="o">=</span> <span class="mi">2</span><span class="p">)</span>
                <span class="k">if</span> <span class="n">plot_center_lines</span> <span