code: def close_spider(self, _spider):
          
          self.df['date_download'] = pd.to_datetime(
              self.df['date_download'], errors='coerce', infer_datetime_format=True
          )
          self.df['date_modify'] = pd.to_datetime(
              self.df['date_modify'], errors='coerce', infer_datetime_format=True
          )
          self.df['date_publish'] = pd.to_datetime(
              self.df['date_publish'], errors='coerce', infer_datetime_format=True
          )
          self.df.to_pickle(self.full_path)
          self.log.info("Wrote to Pandas to %s", self.full_path)
docs: Write out to file