title: get rows count from django_tables2
body: <p>I'm new at django, and I need to get table row count (best it would be if before rendering table) of table which rendered with django table2 in my template</p>
  
  <p>have some code like this:</p>
  
  <pre><code>{% load render_table from django_tables2 %} 
  {% block content %}
      {% render_table  participations_table %}
  {% endblock %}
  </code></pre>
  
  <p>and I want to render this table if there is at least 1 row in it.</p>