">              other plotting fcns)</span>
<span class="sd">        </span>
<span class="sd">    &quot;&quot;&quot;</span>
    <span class="kn">import</span> <span class="nn">matplotlib.pyplot</span> <span class="k">as</span> <span class="nn">plt</span> <span class="c1"># lazy import </span>
    <span class="k">global</span> <span class="n">_CVG_BG</span>
    
    <span class="c1"># Setup hbincenters and hsv_hues:</span>
    <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</spa