Create a command line parser
    :return: parser

def genargs() -> ArgumentParser:
    """
    Create a command line parser
    :return: parser
    """
    parser = ArgumentParser()
    parser.add_argument("infile", help="Input JSG specification")
    parser.add_argument("-o", "--outfile", help="Output python file (Default: {infile}.py)")
    parser.add_argument("-e", "--evaluate", help="Evaluate resulting python file as a test", action="store_true")
    parser.add_argument("-v", "--verbose", help="Verbose output", action="store_true")
    return parser