         New value of the parameter to change</span>
<span class="sd">        new_filename : str</span>
<span class="sd">            Filename of new property file.  If None the original property file will be overwritten (the default is None.)</span>

<span class="sd">        &quot;&quot;&quot;</span>
        <span class="n">filename</span> <span class="o">=</span> <span class="n">get_full_path</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">property_file</sp