Eryk Sun added the comment:
I'm sure Steve already has this covered, but FWIW here's a patch to call
WriteConsoleW. Here's the result with the patch applied:
>>> sys.ps1 = '»»» '
»»» input("αβψδ: ")
αβψδ: spam
'spam'
and with interactive stdin and stdout/stderr redirected to a file:
>set PYTHONIOENCODING=utf-8
>amd64\python_d.exe >out.txt 2>&1
input("αβψδ: ")
spam
^Z
>chcp 65001
Active code page: 65001
>type out.txt
Python 3.6.0b1+ (default, Oct 7 2016, 23:47:58)
[MSC v.1900 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> αβψδ: 'spam'
>>>
If it can't write the prompt for some reason (e.g. out of memory, decoding
fails, WriteConsole fails), it doesn't fall back on fprintf to write the
prompt. Should it?
This should also get a test that calls ReadConsoleOutputCharacter to verify
that the correct prompt is written.
----------
keywords: +patch
Added file: http://bugs.python.org/file45008/issue_28333_01.patch
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<http://bugs.python.org/issue28333>
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