odelineno-9-1" name="__codelineno-9-1" href="#__codelineno-9-1"></a><span class="k">def</span> <span class="nf">show</span><span class="p">(</span>
<a id="__codelineno-9-2" name="__codelineno-9-2" href="#__codelineno-9-2"></a>    <span class="n">filename</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span>
<a id="__codelineno-9-3" name="__codelineno-9-3" href="#__codelineno-9-3"></a>    <span class="n">key</span><span class="o">=</span><span class="kc">None</span><span class="p