main.py

import sys, getopt

def main(argv):
    inputfile = ''
    outputfile = ''
    try:
        opts, args = getopt.getopt(argv, "h:i:o:",["ifile=","ofile="])
    except getopt.GetoptError:
        print('GetoptError test.py -i <inputfile> -o <outputfile>')
        sys.exit(2)

    for opt, arg in opts:

        if opt == '-h':
            print('test.py -i <inputfile> -o <outputfile>')
            sys.exit()
        elif opt in ('-i', '--ifile'):
            inputfile = arg
        elif opt in ('-o', '--ofile'):
            outputfile = arg

    print('input file is "', inputfile)
    print('output file is "', outputfile)

if __name__ == "__main__":
    main(sys.argv[1:])