title: Error while passing value with url to django view
body: <p>Error while passing value to view from template using url </p>
  
  <p>Error :</p>
  
  <pre><code>Error during template rendering
  
  In template D:\TONO\DJANGO_TASK\user_auth\templates\auth_app\other-user-listing.html, error at line 114
  Reverse for 'add_to_group' with arguments '(name: Administrator,)' not found. 1 pattern(s) tried: ['auth_app\\/&lt;str:username&gt;/']
  </code></pre>
  
  <p>This my urls.py</p>
  
  <blockquote>
  <pre><code>url(r'^&lt;str:username&gt;/', views.add_to_group, name="add_to_group"),
  </code></pre>
  </blockquote>
  
  <p>This is the call from template</p>
  
  <pre><code>&lt;a href="{% url 'add_to_group' username  %}"&gt;&lt;i class="icon-plus"&gt;Add&lt;/i&gt; &lt;/a&gt;
  </code></pre>