def METHOD_NAME():
    """
    Parse the command-line arguments being passed to RMG-Py. This uses the
    :mod:`argparse` module, which ensures that the command-line arguments are
    sensible, parses them, and returns them.
    """
    parser = argparse.ArgumentParser()
    parser.add_argument('input', help='RMG input file')
    parser.add_argument('--output', type=str, nargs=1, default='', help='Output folder')
    parser.add_argument('--original', type=str, nargs=1, default='',
                        help='Location of the isotopeless mechanism')
    parser.add_argument('--maximumIsotopicAtoms', type=int, nargs=1, default=[1000000],
                        help='The maxuminum number of isotopes you allow in a specific molecule')
    parser.add_argument('--useOriginalReactions', action='store_true', default=False,
                        help='Use reactions from the original rmgpy generated chem_annotated.inp file')
    parser.add_argument('--kineticIsotopeEffect', type=str, nargs=1, default='',
                        help='Type of kinetic isotope effects to use, currently only "simple" supported.')
    args = parser.parse_args()
    return args