| r"""Command-line tool to validate and pretty-print JSON | |
| Usage:: | |
| $ echo '{"json":"obj"}' | python -m json.tool | |
| { | |
| "json": "obj" | |
| } | |
| $ echo '{ 1.2:3.4}' | python -m json.tool | |
| Expecting property name: line 1 column 2 (char 2) | |
| """ | |
| import sys | |
| import json | |
| def main(): | |
| if len(sys.argv) == 1: | |
| infile = sys.stdin | |
| outfile = sys.stdout | |
| elif len(sys.argv) == 2: | |
| infile = open(sys.argv[1], 'rb') | |
| outfile = sys.stdout | |
| elif len(sys.argv) == 3: | |
| infile = open(sys.argv[1], 'rb') | |
| outfile = open(sys.argv[2], 'wb') | |
| else: | |
| raise SystemExit(sys.argv[0] + " [infile [outfile]]") | |
| try: | |
| obj = json.load(infile) | |
| except ValueError, e: | |
| raise SystemExit(e) | |
| json.dump(obj, outfile, sort_keys=True, indent=4) | |
| outfile.write('\n') | |
| if __name__ == '__main__': | |
| main() |