a fuzzy list</span>

<span class="sd">        :Attributes:</span>

<span class="sd">        tid : int</span>
<span class="sd">            keep tact of transaction id</span>
<span class="sd">        lUtils: float</span>
<span class="sd">            the utility of a fuzzy item in the transaction</span>
<span class="sd">        rUtils : float</span>
<span class="sd">            the resting value of a fuzzy item in the transaction</span>
<span class="sd">        period: int</span>
<span class="sd">            r