def project():
   if request.method=="POST":
     selected_tags=request.form.getlist('table_records')

<li>
   <form action="#" method="post">
   <button type="submit" name="Compare" value="Compare" class="btn-link">Compare</button>
 </li>
  <tbody>
{% for each_run in all_runs %}


...
... Some Table Definition Here (i.e. table, thead etc) ...
...


     <tr>
       <td><input type="checkbox" class="flat" name=table_records value="{{each_run.tag}}"></td>
        <td class=" "><a href= "{{url_for('dummy_link',tag=each_run.tag)}}"> {{each_run.tag}}</a></td>
      </tr>
{% endfor %}

</form>