pan>
<span class="c"># ----------------------------------------------------------------------------</span>

<span class="kn">import</span> <span class="nn">re</span>

<span class="c">#should also look at union and intersects for sets</span>
<span class="c"># and tag.union</span>

<div class="viewcode-block" id="Association"><a class="viewcode-back" href="../../api/association.html#moments.association.Association">[docs]</a><span class="k">class</span> <span class="nc">Association</span><span class="p">(</sp