def METHOD_NAME(self, key, value):
    """
    Parameters
    ----------
    key : str
    value : pd.DataFrame
    Notes
    -----
    To quote the Pandas documentation for pandas.io.pytables.HDFStore.append:
    Append does *not* check if data being appended overlaps with existing
    data in the table, so be careful.
    """
    raise NotImplementedError("NotImplementedError")