tool.py 文件源码

def main():
    if len(sys.argv) == 1:
        infile = sys.stdin
        outfile = sys.stdout
    elif len(sys.argv) == 2:
        infile = open(sys.argv[1], 'r')
        outfile = sys.stdout
    elif len(sys.argv) == 3:
        infile = open(sys.argv[1], 'r')
        outfile = open(sys.argv[2], 'w')
    else:
        raise SystemExit(sys.argv[0] + " [infile [outfile]]")
    with infile:
        try:
            obj = json.load(infile,
                            object_pairs_hook=json.OrderedDict,
                            use_decimal=True)
        except ValueError:
            raise SystemExit(sys.exc_info()[1])
    with outfile:
        json.dump(obj, outfile, sort_keys=True, indent='    ', use_decimal=True)
        outfile.write('\n')