Paul Moore <p.f.mo...@gmail.com> added the comment:
The proposed wording seems a bit over-complex to me. Maybe the following
re-wording would be easier to understand?
The character encoding is platform-dependent. Non-Windows
platforms use the locale encoding (see
locale.getpreferredencoding()).
On Windows, UTF-8 is used for the console device. Non-character
devices such as disk files and pipes use the system locale
encoding (i.e. the ANSI codepage). Non-console character
devices such as NUL (i.e. where isatty() returns True) use the
value of the console input and output codepages at startup,
respectively for stdin and stdout/stderr. This defaults to the
system locale encoding if the process is not initially attached
to a console.
The special behaviour of the console can be overridden
by setting the environment variable PYTHONLEGACYWINDOWSSTDIO
before starting Python. In that case, the console codepages are
used as for any other character device.
Under all platforms, you can override this value by
setting the PYTHONIOENCODING environment variable before
starting Python. However, for the Windows console, this
only applies when PYTHONLEGACYWINDOWSSTDIO is also set.
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<https://bugs.python.org/issue30410>
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