code: def _init(self):
          
          # Note that we assume params.json was already created by JsonLogger
          progress_file = os.path.join(self.logdir, "progress.csv")
          self._continuing = os.path.exists(progress_file)
          self._file = open(progress_file, "a")
          self._csv_out = None
docs: CSV outputted with Headers as first set of results.