[PyQt] Attribute type change problem while using Qt 5.12 / PyQt 5.12.1 and wildcard imports

[Phil Thompson]

On 01/05/2019 13:02, Ümit Öztosun wrote:
>> On 1 May 2019, at 13:19, Phil Thompson <phil at riverbankcomputing.com> 
>> wrote:
>> 
>> On 01/05/2019 10:55, Ümit Öztosun wrote:
>>> Hello,
>>> I have encountered a weird problem using PyQt 5.12.1 and Qt 5.12. 
>>> Take
>>> the following script:
>>> from PyQt5.QtCore import *
>>> class A(QObject):
>>>    flag = True
>>> a = A()
>>> print a.flag
>>> This outputs QCborSimpleType.True. Boolean attribute somehow 
>>> converted to
>>> a QCborSimpleType. However, just changing the wildcard import 
>>> corrects
>>> output:
>>> from PyQt5.QtCore import QObject
>>> class A(QObject):
>>>    flag = True
>>> a = A()
>>> print a.flag
>>> Output is True this time.
>>> I have tried various configurations, here are the wildcard import 
>>> test
>>> outputs: (Qt/Sip/PyQt all are compiled from source)
>>> Ubuntu 18.04 / Qt-5.12.3 / sip-4.19.16 / PyQt5_gpl-5.12.1
>>> => QCborSimpleType.True
>>> Ubuntu 18.04 / Qt-5.12.3 / sip-4.19.16 / 
>>> PyQt5_gpl-5.12.2.dev1904191828
>>> => QCborSimpleType.True
>>> MacOS 10.14.4 / Qt-5.12.3 / sip-4.19.16 / PyQt5_gpl-5.12.1
>>> => QCborSimpleType.True
>>> Ubuntu 18.04 / Qt-5.11.3 / sip-4.19.16 / PyQt5_gpl-5.12.1
>>> => True
>>> Problem only occurs while using Qt-5.12. Using Qt-5.11 brings things 
>>> to
>>> normal. AFAIK CBOR support was added in Qt 5.12 and this may be 
>>> related:
>>> https://doc.qt.io/qt-5/whatsnew512.html
>>> Any ideas?
>> 
>> Works fine for me (although I haven't tried it with Python v2). Weird 
>> things like this are usually build problems, mis-matched versions, old 
>> things lying around.
>> 
>> Phil
> 
> Hi Phil,
> 
> I have missed the important part; yes this was on Python 2.7. I have
> spun up a new Ubuntu 18.04 VM for the tests, just to make sure build
> is clean. I have build Sip-4.19.16 and PyQt5_gpl5.12.1 using Qt-5.12.3
> for Python v3 after your response, and this build does not have the
> mentioned problem. But Python v2 has it. Python versions used are
> Python 2.7.15rc1 and Python 3.6.7.

Should be fixed in tonight's SIP snapshot.

Thanks,
Phil