code: def to_hdf5(self, filepath: str):
          
          try:
              self.start("Saving data to Hdf5...")
              dd.io.save(filepath, self.df)
              self.end("Finished saving Hdf5 data")
          except Exception as e:
              self.err(e, "Can not convert data to Hdf5")
docs: Write the main dataframe to Hdf5 file
  
          :param filepath: path where to save the file
          :type filepath: str
  
          :example: ``ds.to_hdf5_("./myfile.hdf5")``