michael@0: r"""
michael@0: Using simplejson from the shell to validate and
michael@0: pretty-print::
michael@0:     
michael@0:     $ echo '{"json":"obj"}' | python -msimplejson
michael@0:     {
michael@0:         "json": "obj"
michael@0:     }
michael@0:     $ echo '{ 1.2:3.4}' | python -msimplejson
michael@0:     Expecting property name: line 1 column 2 (char 2)
michael@0: 
michael@0: Note that the JSON produced by this module's default settings
michael@0: is a subset of YAML, so it may be used as a serializer for that as well.
michael@0: """
michael@0: import simplejson
michael@0: 
michael@0: #
michael@0: # Pretty printer:
michael@0: #     curl http://mochikit.com/examples/ajax_tables/domains.json | python -msimplejson.tool
michael@0: #
michael@0: 
michael@0: def main():
michael@0:     import sys
michael@0:     if len(sys.argv) == 1:
michael@0:         infile = sys.stdin
michael@0:         outfile = sys.stdout
michael@0:     elif len(sys.argv) == 2:
michael@0:         infile = open(sys.argv[1], 'rb')
michael@0:         outfile = sys.stdout
michael@0:     elif len(sys.argv) == 3:
michael@0:         infile = open(sys.argv[1], 'rb')
michael@0:         outfile = open(sys.argv[2], 'wb')
michael@0:     else:
michael@0:         raise SystemExit("%s [infile [outfile]]" % (sys.argv[0],))
michael@0:     try:
michael@0:         obj = simplejson.load(infile)
michael@0:     except ValueError, e:
michael@0:         raise SystemExit(e)
michael@0:     simplejson.dump(obj, outfile, sort_keys=True, indent=4)
michael@0:     outfile.write('\n')
michael@0: 
michael@0: 
michael@0: if __name__ == '__main__':
michael@0:     main()