[New-bugs-announce] [issue7441] Py3.1: Fatal Python Error: Py_Initialize...unknown encoding: chcp 65001.

Lie Ryan report at bugs.python.org
Sat Dec 5 11:40:58 CET 2009

New submission from Lie Ryan <lie.1296 at gmail.com>:

maybe related to #6501

Vista 32-bit SP1, Python 3.1:
Microsoft Windows [Version 6.0.6000]
Copyright (c) 2006 Microsoft Corporation.  All rights reserved.
D:\>chcp 65001
Active code page: 65001

D:\>python -c 'print("")'
Fatal Python error: Py_Initialize: can't initialize sys standard streams
LookupError: unknown encoding: cp65001

This application has requested the Runtime to terminate it in an unusual
Please contact the application's support team for more information.
Python 3.1.1 (r311:74483, Aug 17 2009, 17:02:12) [MSC v.1500 32 bit
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.

Expected, either:
1. print nothing (""), or
2. python exception about unknown encoding, or
3. python exception about cannot encode to the encoding

cp65001 is supposed to be an alias for utf-8. Because of the error,
there is AFAICT no way to set the command prompt to accept utf-8 output
even for pipe redirection.

A workaround is to use sys.stdout.buffer.write() to write raw byte
strings, encoding manually. But this takes us back to python 2.

components: IO, Interpreter Core, Unicode, Windows
messages: 95987
nosy: lieryan
severity: normal
status: open
title: Py3.1: Fatal Python Error: Py_Initialize...unknown encoding: chcp 65001.
type: crash
versions: Python 3.1

Python tracker <report at bugs.python.org>

More information about the New-bugs-announce mailing list