r“”“Command-line tool to validate and pretty-print JSON

Usage

$ echo '{“json”:“obj”}' | python -m simplejson.tool {

"json": "obj"

} $ echo '{ 1.2:3.4}' | python -m simplejson.tool Expecting property name: line 1 column 2 (char 2)

“”“ import sys import simplejson

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 = simplejson.load(infile)
except ValueError, e:
    raise SystemExit(e)
simplejson.dump(obj, outfile, sort_keys=True, indent=4)
outfile.write('\n')

if __name__ == '__main__':

main()