text: from django.template import Library
  
  register = Library()
  
  
  @register.filter
  def access(value, arg):
      """
      Template filter to access a dictionary by a key.
  
      :param value: Dictionary to access
      :param arg: Key to look up
      :return: Value of key in dictionary
      """
      try:
          return value[arg]
  
      except KeyError:
          return None
  
      except TypeError:
          # Is a GroupedResult not a dictionary
          for item in value:
              if item.field.short_name == arg:
                  return item
  
          return None
  