def METHOD_NAME(data_files_short, data_folder):
    if isinstance(data_files_short, str):
        return data_folder.joinpath(data_files_short)
    elif isinstance(data_files_short, list):
        return [data_folder.joinpath(df) for df in data_files_short]
    else:
        return {
            data_folder.joinpath(df): value
            for df, value in data_files_short.items()
            }