Can't import default pyqt6 wheels on windows

[Charles]

I also notice that Qt6Charts.dll imports libc++.dll, so this seems to be
the one that is compiled with mingw instead of msvc.

On Fri, Dec 15, 2023 at 5:44 PM Charles <peacech at gmail.com> wrote:

> At least with PyQt6/PyQt6-Qt6/PyQt6-QtCharts/PyQt6-QtCharts-Qt version
> 6.6.0, Qt6Charts.dll exports and imports using C calling convention
> (__cdecl) instead of C++ convention, causing the error above.
>
> This is visible from this sample of exported names, which start with
> underscore:
>
> 2617 (0x0a39),  (0x), _ZN25QCandlestickSeriesPrivate16staticMetaObjectE,
> 0x0011e3b0, Demumble
> 2618 (0x0a3a),  (0x),
> _ZN25QCandlestickSeriesPrivate18handleSeriesChangeEP15QAbstractSeries,
> 0x000df070, Demumble
> 2619 (0x0a3b),  (0x),
> _ZN25QCandlestickSeriesPrivate18handleSeriesRemoveEP15QAbstractSeries,
> 0x000df090, Demumble
> 2620 (0x0a3c),  (0x),
> _ZN25QCandlestickSeriesPrivate18initializeGraphicsEP13QGraphicsItem,
> 0x000ded80, Demumble
> 2621 (0x0a3d),  (0x),
> _ZN25QCandlestickSeriesPrivate18qt_static_metacallEP7QObjectN11QMetaObject4CallEiPPv,
> 0x000df9c0, Demumble
> 2622 (0x0a3e),  (0x),
> _ZN25QCandlestickSeriesPrivate19createLegendMarkersEP7QLegend, 0x000def10,
> Demumble
> 2623 (0x0a3f),  (0x),
> _ZN25QCandlestickSeriesPrivate19updatedCandlesticksEv, 0x000dfe60, Demumble
> 2624 (0x0a40),  (0x),
> _ZN25QCandlestickSeriesPrivate20initializeAnimationsE6QFlagsIN6QChart15AnimationOptionEEiR12QEasingCurve,
> 0x000dee70, Demumble
>
> You might try replacing Qt6Charts.dll with the one from PySide6.
>
> On Fri, Dec 15, 2023 at 4:57 PM Patrick Stinson <patrickkidd at gmail.com>
> wrote:
>
>> I might add that this was done in a virtual environment created by
>> pipenv. Looks like it works when using the system installed python.
>>
>> > On Dec 14, 2023, at 5:41 PM, Patrick Stinson <patrickkidd at gmail.com>
>> wrote:
>> >
>> > I get a DLL linking error with a clean python 3.9.13 install and "pip
>> install pyqt6" on windows. This occurs on every machine I try it on in our
>> lab, whether windows 10 or windows 11. Installing "pyqt6-tools" gets me
>> going for just pyqt6. I am doing a lot of pretty basic stuff so I am not
>> tied to a particular pyqt6 or Qt6 version.
>> >
>> > Now I want to use pyqt6-charts and I am getting the DLL error again:
>> "DLL load failed while importing QtCharts: the specified procedure can't be
>> found."
>> >
>> > Are the pyqt6 wheels all really broken? Is it my python version? The
>> wheels do include the qt binaries so what is going on? This problem is
>> easily reproducible so I thought there might be a straightforward answer
>> here.
>> >
>> > Cheers
>> > -Patrick
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://www.riverbankcomputing.com/pipermail/pyqt/attachments/20231215/f71ea6a5/attachment-0001.htm>