unmsgpack.py

#!/usr/bin/env python

import msgpack
import sys

try:
  while True:
    line = sys.stdin.readline().strip('\n')
    try:
      print msgpack.unpackb(line)
    except (TypeError, ValueError, msgpack.exceptions.UnpackValueError,
            msgpack.exceptions.ExtraData):
      print line
except KeyboardInterrupt:
  pass