1r"""Command-line tool to validate and pretty-print JSON
2
3Usage::
4
5    $ echo '{"json":"obj"}' | python -m simplejson.tool
6    {
7        "json": "obj"
8    }
9    $ echo '{ 1.2:3.4}' | python -m simplejson.tool
10    Expecting property name: line 1 column 2 (char 2)
11
12"""
13import sys
14import simplejson as json
15
16def main():
17    if len(sys.argv) == 1:
18        infile = sys.stdin
19        outfile = sys.stdout
20    elif len(sys.argv) == 2:
21        infile = open(sys.argv[1], 'rb')
22        outfile = sys.stdout
23    elif len(sys.argv) == 3:
24        infile = open(sys.argv[1], 'rb')
25        outfile = open(sys.argv[2], 'wb')
26    else:
27        raise SystemExit(sys.argv[0] + " [infile [outfile]]")
28    try:
29        obj = json.load(infile,
30                        object_pairs_hook=json.OrderedDict,
31                        use_decimal=True)
32    except ValueError, e:
33        raise SystemExit(e)
34    json.dump(obj, outfile, sort_keys=True, indent='    ', use_decimal=True)
35    outfile.write('\n')
36
37
38if __name__ == '__main__':
39    main()
40