Enhanced pythons json.tools script to print utf-8 chars

jsonformat.py

#!/usr/bin/env python
r"""Command-line tool to validate and pretty-print JSON
Usage::
    $ echo '{"json":"obj"}' | python jsonformat.py
    {
        "json": "obj"
    }
    $ echo '{ 1.2:3.4}' | python jsonformat.py
    Expecting property name enclosed in double quotes: line 1 column 3 (char 2)
"""
import io
import sys
import json
import codecs
import errno

def main():
    if len(sys.argv) == 1:
        infile = sys.stdin
        outfile = sys.stdout
    elif len(sys.argv) == 2:
        infile = io.open(sys.argv[1], 'r', encoding='utf8')
        # outfile = sys.stdout
        outfile = sys.stdout = codecs.getwriter('utf8')(sys.stdout)
    elif len(sys.argv) == 3:
        infile = io.open(sys.argv[1], 'r', encoding='utf8')
        outfile = io.open(sys.argv[2], 'wb')
        # outfile = codecs.open('_{}'.format(sys.argv[2]), 'wb', encoding="utf-8")
    else:
        raise SystemExit(sys.argv[0] + " [infile [outfile]]")
    with infile:
        try:
            obj = json.load(infile)
        except ValueError as e:
            raise SystemExit(e)
    with outfile:
    # with outfile:
        try:
            data = json.dumps(obj, sort_keys=True,
                  indent=4, separators=(',', ': '), ensure_ascii=False)
            outfile.write(data.encode('utf8'))
        except IOError as e:
            if e.errno != errno.EPIPE:
                raise e

if __name__ == '__main__':
    main()