import argparse

def main():
    parser = argparse.ArgumentParser(description='Creates a file and writes into it.')
    parser.add_argument('file_name', help='File name to be written to.')
    parser.add_argument('contents', help='A string to be written into the file.')

    args, unknown_args = parser.parse_known_args()

    with open(args.file_name, "w") as f:
        f.write(args.contents)

if __name__=="__main__":
    main()
