[issue32287] Import of _pyio module failed on cygwin

[Masayuki Yamamoto]

Masayuki Yamamoto <ma3yuki.8mamo10 at gmail.com> added the comment:

This issue seems to duplicate #28459.

#28459 has a patch (implement _setmode() by ctypes on _pyio).  I'm not sure _setmode() will be used in other places in the future, but the patch just works at the moment.
In addition, I have an idea which implements C extension (imitation msvcrt or just cygwin).

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<https://bugs.python.org/issue32287>
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