python/lib/django_1_4/django/utils/simplejson/tool.py

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