code: def _load_data_and_files(self):
          
          if not _hasattr(self, '_data'):
              self._data, self._files = self._parse()
              if self._files:
                  self._full_data = self._data.copy()
                  self._full_data.update(self._files)
              else:
                  self._full_data = self._data
docs: Parses the request content into `self.data`.