1import os 2 3if __name__ == '__main__': 4 while True: 5 buf = os.read(0, 1024) 6 if not buf: 7 break 8 try: 9 os.write(1, b'OUT:'+buf) 10 except OSError as ex: 11 os.write(2, b'ERR:' + ex.__class__.__name__.encode('ascii')) 12