title: django template nested dictionary, grab value by key
body: <p>In a django template, if I have a key within the context dictionary assocoated with another dictionary (a nested dictionary), I know how to itterate over it (<a href="https://stackoverflow.com/questions/8018973/how-to-iterate-through-dictionary-in-a-dictionary-in-django-template">how to iterate through dictionary in a dictionary in django template?</a>) but I need to find a value by key. </p>
  
  <p>like <code>{{ nested_dictionary['key'] }}</code></p>
  
  <p>But I'm guessing not exactly that... </p>
  
  <p>Filters could be used, but is there a better way?</p>