      def to_representation(self, value):
          """
          List of object instances -> List of dicts of primitive datatypes.
          """
          return dict([
              (six.text_type(key), self.child.to_representation(val))
              for key, val in value.items()
          ])
  
  
  class JSONField(Field):
 
</s> remove         ])
 </s> add         } </s> remove         ])
 </s> add         } </s> remove         return dict([
            (six.text_type(key), self.child.run_validation(value))
 </s> add         return {
            six.text_type(key): self.child.run_validation(value) </s> remove         return set([
 </s> add         return { </s> remove         ])
 </s> add         }
        return {
            six.text_type(key): self.child.to_representation(val)
      def to_representation(self, value):
          """
          List of object instances -> List of dicts of primitive datatypes.
          """
        return {
            six.text_type(key): self.child.to_representation(val)
        return {
            six.text_type(key): self.child.to_representation(val)
              for key, val in value.items()
          ])
  
  
  class JSONField(Field):
keep keep keep keep replace replace keep keep keep keep keep
 Replaced all dict and set conversions from lists to dict and set literals. 
rest_framework/fields.py