modify function description

                 split_seed=None,

                 save_dir=None,

                 save_timestamp=False):

  """Load and featurize raw PDBBind dataset.

    """Load raw PDBBind dataset by featurization and split.

    Parameters

    ----------

  data_dir: String, optional

    Specifies the data directory to store the featurized dataset.

  split: Str

    Either "random" or "index"

  feat: Str

    Either "grid" or "atomic" for grid and atomic featurizations.

    reload: Bool, optional

        Reload saved featurized and splitted dataset or not.

    data_dir: Str, optional

        Specifies the directory storing the raw dataset.

    load_binding_pocket: Bool, optional

        Load binding pocket or full protein.

    subset: Str

    Only "core" or "refined" for now.

        Specifies which subset of PDBBind, only "core" or "refined" for now.

    featurizer: Str

        Either "grid" or "atomic" for grid and atomic featurizations.

    split: Str

        Either "random" or "index".

    split_seed: Int, optional

        Specifies the random seed for splitter.

    save_dir: Str, optional

        Specifies the directory to store the featurized and splitted dataset when

        reload is False. If reload is True, it will load saved dataset inside save_dir. 

    save_timestamp: Bool, optional

        Save featurized and splitted dataset with timestamp or not. Set it as True

        when running similar or same jobs simultaneously on multiple compute nodes.

    """

  pdbbind_tasks = ["-logKd/Ki"]

    deepchem_dir = deepchem.utils.get_data_dir()