>
<p>Once the top level “UI” has the <code class="docutils literal notranslate"><span class="pre">__name__</span></code> logger, each child logger, should attach to this main logger.  Therefore
in child class and code, the usage of environmental definition <code class="docutils literal notranslate"><span class="pre">__main__</span></code></p>
<div class="highlight-Python notranslate"><div class="highlight"><pre><span></span><span class="n">log</span> <span class="o">=</span> <span class="n">logging</spa