[issue32287] Import of _pyio module failed on cygwin

[Berker Peksag]

Change by Berker Peksag :


--
superseder:  -> _pyio module broken on Cygwin / setmode not usable

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[issue32287] Import of _pyio module failed on cygwin

[Erik Bray]

Erik Bray  added the comment:

Indeed, this is a duplicate of #28459.  I'll also update the existing patch to 
a pull request.

--
resolution:  -> duplicate
stage: needs patch -> resolved
status: open -> closed

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[issue32287] Import of _pyio module failed on cygwin

[Masayuki Yamamoto]

Masayuki Yamamoto  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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[issue32287] Import of _pyio module failed on cygwin

[Zachary Ware]

Zachary Ware  added the comment:

Right, so you should raise an issue with cherrypy :).  You're more likely to 
get a fix from them quickly, and their usage of _pyio is not correct anyway.

Also, note that Cygwin is not (anymore/yet) a fully-supported platform.  We're 
working towards that status, but aren't there yet.

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[issue32287] Import of _pyio module failed on cygwin

[Christian Heimes]

Christian Heimes  added the comment:

Could you please file a bug with cherrypy and get it fixed?

Cygwin not yet officially supported and stable. Erik is working hard on stable 
support for 3.7.

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[issue32287] Import of _pyio module failed on cygwin

[Matúš Valo]

Matúš Valo  added the comment:

I am using not using _pyio module directly but I am using cherrypy server which 
is using this module (more precisely its component cheroot):
https://github.com/cherrypy/cheroot/blob/86c6b246ec7cb704c6f96123556db1a083301634/cheroot/makefile.py#L5

Regarding installation of cygwin environment, I can check it in other machine.

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[issue32287] Import of _pyio module failed on cygwin

[Zachary Ware]

Zachary Ware  added the comment:

Presumably this issue does prevent us from testing _pyio on Cygwin, which is 
not ideal.  The outside usage of _pyio is definitely not supported, as 
Christian said, but this may be worth fixing anyway.

--
nosy: +masamoto, zach.ware
priority: normal -> low
stage:  -> needs patch
type: crash -> behavior
versions: +Python 3.7 -Python 3.6

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[issue32287] Import of _pyio module failed on cygwin

[R. David Murray]

Change by R. David Murray :


--
nosy: +erik.bray

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[issue32287] Import of _pyio module failed on cygwin

[Christian Heimes]

Christian Heimes  added the comment:

The msvcrt module is part of the standard library on Windows. Your cygwin 
installation may be incomplete.

By the way, why are you importing a private module? _pyio isn't a public API 
and shouldn't be used.

--
nosy: +christian.heimes

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[issue32287] Import of _pyio module failed on cygwin

[Matúš valo]

Matúš valo  added the comment:

Previous import is working in python 2.7:
$ python
Python 2.7.14 (default, Oct 31 2017, 21:12:13)
[GCC 6.4.0] on cygwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import _pyio
>>>

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[issue32287] Import of _pyio module failed on cygwin

[Matúš valo]

New submission from Matúš valo :

When trying to impor _pyio from python3 in Cygwin, import fails with exception:
$ python3
Python 3.6.3 (default, Oct 31 2017, 19:00:36)
[GCC 6.4.0] on cygwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import _pyio
Traceback (most recent call last):
  File "", line 1, in 
  File "/usr/lib/python3.6/_pyio.py", line 17, in 
from msvcrt import setmode as _setmode
ModuleNotFoundError: No module named 'msvcrt'

This issue is breaking cherrypy server (cheroot component):
https://github.com/cherrypy/cheroot/blob/86c6b246ec7cb704c6f96123556db1a083301634/cheroot/makefile.py#L5

--
components: IO, Library (Lib)
messages: 308115
nosy: Matúš valo
priority: normal
severity: normal
status: open
title: Import of _pyio module failed on cygwin
type: crash
versions: Python 3.6

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