def read_data_file(file: str):
    """
    Load specific data file (in this case only used to read data_files)
    :param file: data file
    :return: data file content
    """
    data_tmp = None
    if file != "":
        with open(file) as fp:
            data_tmp = fp.read().split("\n")
            data_tmp = data_tmp[:-1]
    return data_tmp