ss="o">.</span><span class="n">_sparse</span> <span class="o">=</span> <span class="n">value</span>

    <span class="nd">@property</span>
    <span class="k">def</span> <span class="nf">periodic</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
        <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_periodic</span>

    <span class="nd">@periodic</span><span class="o">.</span><span class="n">setter</span>
    <span class="