<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _init(self):
 """CSV outputted with Headers as first set of results."""

        # 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