Changes

    self._cached_shards = None

  def move(self, new_data_dir: str,

           delete_if_exists: Optional[bool] = False) -> None:

           delete_if_exists: Optional[bool] = True) -> None:

    """Moves dataset to new directory.

    Note

    ----

    This is a stateful operation! `self.data_dir` will be moved into

    `new_data_dir`. If `delete_if_exists` is set to `True` (by default this is

    set `False`), then `new_data_dir` is deleted if it's a pre-existing

    set `True`), then `new_data_dir` is deleted if it's a pre-existing

    directory.

    Parameters

    ----------

    new_data_dir: str

      The new directory name to move this to dataset to.

    delete_if_exists: Optional[bool] (default False)

    delete_if_exists: Optional[bool] (default True)

      If this option is set, delete the destination directory if it exists

      before moving. This is set to False by default since by default one

      directory does not delet another when calling the unix `mv` command.

      before moving. This is set to True by default to be backwards compatible

      with behavior in earlier versions of DeepChem.

    """

    if delete_if_exists and os.path.isdir(new_data_dir):

      shutil.rmtree(new_data_dir)