import argparse

def main():
    parser = argparse.ArgumentParser(
        formatter_class=argparse.ArgumentDefaultsHelpFormatter)
    parser.add_argument(
        '--dataset',
        metavar='NAME',
        help='the dataset to load training points from',
        default='glove-100-angular',
        choices=DATASETS.keys())
    parser.add_argument(
        "-k", "--count",
        default=10,
        type=positive_int,
        help="the number of near neighbours to search for")
    parser.add_argument(
        '--definitions',
        metavar='FILE',
        help='load algorithm definitions from FILE',
        default='algos.yaml')
    parser.add_argument(
        '--image-tag',
        default=None,
        help='pull image first')