[PySide] Important: 5.15.0 wheels (Windows 64bit) replaced

icfwm at gmx.net icfwm at gmx.net
Mon Jun 15 16:55:24 CEST 2020

Hi Cristian,

I fear this is still not working for me. I just installed 5.15.0 into a
fresh virtual environment (it used
PySide2-5.15.0-5.15.0_1_cp35.cp36.cp37.cp38-none-win64.whl and the
corresponding shiboken2 package). Afterwards I got "ImportError: DLL
load failed: Das angegebene Modul wurde nicht gefunden" when importing
the QtCore module. Doing the same thing with PySide2- works as

Best Regards

On 15.06.20 10:51, Cristián Maureira-Fredes wrote:
> Hello everyone!,
> We just updated the Windows (64bit) wheels on PyPi
> due to a packaging problem.
> Some users started to report a problem when trying
> > import PySide2
> That looked like this:
> > PySide2/__init__.py: Unable to import shiboken2 from [snip]
> >     from .shiboken2 import *
> > ImportError: DLL load failed while importing shiboken2: The
> specified > module could not be found.
> It took us some time to check this,
> because not everyone could reproduce, until finally
> we figure out that it was due to a problematic DLL.
> The issue is that the Qt CI was updated for 5.15.0
> and we started to use MSVC 2019, hence we shipped
> those DDLs (like vcruntime140.dll).
> You can find the fixes for the situation in the following
> patches:
> https://codereview.qt-project.org/c/pyside/pyside-setup/+/303785
> https://codereview.qt-project.org/c/pyside/pyside-setup/+/303914
> Why it worked for some people?
> Because having a 'newer' version of MSVC installed in your system
> provided the missing DLL, so people with 2019 compatible
> redistributable binaries, didn't see the issue.
> Since this problem was affecting only Windows,
> we decided to update only those wheels, that now contain a "_1"
> in the name, so people will be able to install 5.15.0
> and get the updated version.
> If you already have 5.15.0 installed,
> you will need to reinstall:
> > pip uninstall PySide2 # will uninstall 5.15.0
> > pip install PySide2 # will install 5.15.0_1
> Thanks to all the people that helped us to figure out
> the problem, and we invite you to join the different
> platforms we have to be in touch with the community:
> https://wiki.qt.io/Qt_for_Python#Community
> Have a nice week!
> Cheers

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