      def determine_content(self, request):
          """If the request contains content return a tuple of (content_type, content) otherwise return None.
          Note that content_type may be None if it is unset."""
          if not request.META.get('CONTENT_LENGTH', None) and not request.META.get('TRANSFER_ENCODING', None):
              return None
          content_type = request.META.get('CONTENT_TYPE', None)
  
          if (request.method == 'POST' and self.CONTENT_PARAM and
              request.POST.get(self.CONTENT_PARAM, None) is not None):
  
 
</s> remove         #TODO: document
 </s> add  </s> remove 
        if request.method == 'POST':
 </s> add         elif request.method == 'POST':
            return None # TODO : Breaks, because determine_content should return a tuple.
      def determine_content(self, request):
          """If the request contains content return a tuple of (content_type, content) otherwise return None.
          Note that content_type may be None if it is unset."""
          if not request.META.get('CONTENT_LENGTH', None) and not request.META.get('TRANSFER_ENCODING', None):
            return None # TODO : Breaks, because determine_content should return a tuple.
          content_type = request.META.get('CONTENT_TYPE', None)
  
          if (request.method == 'POST' and self.CONTENT_PARAM and
              request.POST.get(self.CONTENT_PARAM, None) is not None):
  
keep keep keep keep replace keep keep keep keep keep
 FomrParser now implements a work around for empty values in a list 
djangorestframework/content.py