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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _create_trial_info(self, expr_dir):
 """Create information for given trial. Meta file will be loaded if exists, and the trial information will be saved in db backend. Args: expr_dir (str):
 Directory path of the experiment. """

        meta = self._build_trial_meta(expr_dir)

        self.logger.debug("Create trial for %s" % meta)

        trial_record = TrialRecord.from_json(meta)
        trial_record.save()