>copy</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
        <span class="sd">&quot;&quot;&quot;Creates a deep copy of the bag. This function is used internally</span>
<span class="sd">        by the package.&quot;&quot;&quot;</span>
        <span class="n">result</span> <span class="o">=</span> <span class="n">DataNodes</span><span class="p">()</span>
        <span class="n">result</span><span class="o">.</span><span class="n">data</span> <span class="o">=</span> <span 