| 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 enclosed in double quotes: line 1 column 3 (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]]") |
| with infile: |
| try: |
| obj = json.load(infile) |
| except ValueError, e: |
| raise SystemExit(e) |
| with outfile: |
| json.dump(obj, outfile, sort_keys=True, |
| indent=4, separators=(',', ': ')) |
| outfile.write('\n') |
| |
| |
| if __name__ == '__main__': |
| main() |
