> Here is a new patch [code_encoding.patch] implementing this idea:
> - Use filesystem encoding (and surrogateescape) to encode/decode
> paths in compile() and the parser, instead of utf-8 in strict mode
> (...)
> The patch restores the situation before #6543.

About Python 3.1 compatibility: Python 3.1 doesn't support non-ascii paths with a locale different than utf-8 (see issue #8611), so it doesn't change anything for Python 3.1 (it doesn't work anyway, with utf-8 or filesystem encoding).