Python Script Input

getopt.py

def usage():
    """ Script Usage """
    print "Usage: python main.py OPTIONS INPUT_FILE [OUTPUT_FILE] "
    print "OPTIONS:"
    print "    --help, --usage, -h: Show this help message"
    print "    --meta=, -m: Meta File"
    print "ARGS:"
    print "    INPUT_FILE: input file name or path"
    print "    OUTPUT_FILE: output file path"
    print ""
    print "EXAMPLES:"
    print "    python main.py --meta=meta.xml inp.log output.log"
    print "    ./main.py --meta=config.xml cust_inp.log"
    sys.exit(1)


def run():
    # Read the Input Options and Arguments
    try:
        # options is the string of option letters that the script wants to recognize, with options that require an argument followed by a colon
        opts, args = getopt.getopt(sys.argv[1:], 'hm:o:', ['meta=', 'output=', 'help', 'usage'])
    except getopt.GetoptError, err:
        print str(err)
        usage()
        sys.exit(2)

    output_file_name = None
    output_file = None

    for o, v in opts:
        if o in ['--meta', '-m']:
            meta_file = v
        elif o in ['--help', '--usage', '-h']:
            usage()
            sys.exit()
        else:
            assert False, "Invalid Arguments"
            usage()
            sys.exit()

if __name__ == '__main__':
    run()