STINNER Victor <victor.stin...@haypocalc.com> added the comment:
> All I'm trying to do is run different versions of Python on the same machine
> from the command line.
> Some code inside Python now "break" if Python 3.1 is started with Code Page
> 65001.
Yes, this issue can be seen as a regression introduced in Python 3.
> I fully understand the change between Python 2.7 and 3.1 were probably due to
> trying to fix issue #1602 (or some other related issue).
Python 2 and 3 are very different. In Python 2, print "abc" writes a
byte string to stdout, whereas print("abc") writes a Unicode string to
stdout. Byte strings and character strings are two different things ;-)
Python 3 now uses Unicode by default and it requires a codec to encode
strings to stdout. If your program don't output anything to stdout, use
pythonw.exe instead of python.exe.
The issue #1602 is not specific to Python 3: Python 2 is unable to
display correctly Unicode strings in the Windows console. It's less
important in Python 2, because most developers use the default string
type which is a byte string.
> Setting my cmd.exe code page to 65001 shouldn't mean a thing to Python if it
> can't associate it with an encoding. It could, at least, just switch to
> 7-Bit ASCII and proceed on. That would be better than failing!
I don't like this idea. In Python, we try to not ignore errors, but try
instead to fix them or at least fail with an error message (the user is
responsible to fix it or use a workaround). To fix this issue, we have
to implement a cp65001 codec for Python or to work directly in Unicode
using WriteConsole.
If you cannot help to implement one of this option, you can use a
workaround:
- don't change the codepage
- use PYTHONIOENCODING=utf-8
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<http://bugs.python.org/issue12632>
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