>>>
>>> I am trying to update spyder on rawhide and F35. The main issue I have is
>>> that pyqt requirements are strict. From the setup file,
>>>
>>> 'pyqt5<5.13',
>>> 'pyqtwebengine<5.13',
>>>
>>> Fedora has 5.15.x. If I relax QT versions, built and launch spyder, I get
>>> this error and spyder fails to launch.
>>>
>>> scaled(self, int, int, aspectRatioMode: Qt.AspectRatioMode =
>>> Qt.IgnoreAspectRatio, transformMode: Qt.TransformationMode =
>>> Qt.FastTransformation): argument 1 has unexpected type 'float'
>>>
>>> scaled(self, QSize, aspectRatioMode: Qt.AspectRatioMode =
>>> Qt.IgnoreAspectRatio, transformMode: Qt.TransformationMode =
>>> Qt.FastTransformation): argument 1 has unexpected type 'float'
>>
>> Do you know where is this error triggered? Try explicitly converting the
>> floats to integers.
>
> Yeah, that sounds more like a common Python 3.10 issue than an issue with
> newer PyQt.
>
No, this is definitely a change in PyQt, or at least sip, cf.
https://github.com/matplotlib/matplotlib/pull/17565
https://github.com/matplotlib/matplotlib/pull/17600
The fix is 'easy', but you need to find everywhere that might trigger
it. QSize takes an int now, as it does in Qt (from C++), instead of
coercing a float.
Python 3.10 also contains a change where you can no longer pass floats to
extension modules in cases where there would a loss of precision (e.g., as
an int).
Scott