an><span class="p">:</span> <span class="nb">float</span><span class="p">,</span> <span class="n">period</span><span class="p">:</span> <span class="nb">int</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kc">None</span><span class="p">:</span>
<span class="w">        </span><span class="sd">&quot;&quot;&quot;</span>
<span class="sd">        To Store the patten</span>

<span class="sd">        :param prefix: prefix of itemSet</span>
<span class="sd">        :type prefix: list</span>