Pretty print for JSON, in Python

pjson.py

#!/usr/bin/env python
# -*- coding: utf8 -*-

from simplejson import loads
from simplejson.decoder import JSONDecodeError
from betterprint import pprint
from os import path


if __name__ == '__main__':
  from sys import argv, exit, stdin
  import fileinput

  if len(argv) < 2 and stdin.isatty():
    print "Usage: %s [json_file]" % argv[0]
    exit(1)

  text = "\n".join((l for l in fileinput.input()))
  try:
    pprint(loads(text))
  except JSONDecodeError:
    pprint(text)