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

[Ümit Öztosun]

> On 2 May 2019, at 16:57, Phil Thompson <phil at riverbankcomputing.com> wrote:
> 
> 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.

Hi Phil,

I can confirm that on sip-4.19.17.dev1905021336 / PyQt5_gpl-5.12.1 / Qt-5.12.3 / Python 2.7.15 problem is fixed.

Thanks for your help.

Regards,
Ümit Öztosun

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