f</span><span class="o">.</span><span class="n">get_value</span><span class="p">(</span><span class="n">i</span><span class="p">)</span>


  <span class="k">def</span> <span class="nf">__setitem__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">value</span><span class="p">):</span>

    <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">set_value</span><span class="p">(</span><span class="n">value</span><span cl