itle="Permalink to this headline">¶</a></h1>
<dl class="py function">
<dt class="sig sig-object py" id="outbreak_tools.const_idx">
<span class="sig-prename descclassname"><span class="pre">outbreak_tools.</span></span><span class="sig-name descname"><span class="pre">const_idx</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">df</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">const</span></span></em>, <em class="sig-param"><span