def access_SUSY_dataset_format_file(filename):
    """
    This function accesses a CSV file containing data of the form of the [SUSY
    dataset](https://archive.ics.uci.edu/ml/datasets/SUSY), i.e. with the first
    column being class labels and other columns being features.
    """
    # Load the CSV file to a list.
    with open(filename, "rb") as dataset_file:
        dataset_CSV = [row for row in csv.reader(dataset_file, delimiter = ",")]
        # Reorganise the data.
        return [
            i for i in itertools.chain(*[list((element[1:],
            [int(float(element[0]))])) for element in dataset_CSV])
        ]