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 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()