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List:       pykde
Subject:    Re: [PyQt] Interfacing with binary files: QDataStream issue
From:       Phil Thompson <phil () riverbankcomputing ! com>
Date:       2017-06-21 16:18:49
Message-ID: 97AE125A-68D1-42BC-B89B-0B7E6EE31591 () riverbankcomputing ! com
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On 19 Jun 2017, at 8:08 pm, Christopher Probst <christop.probst@gmail.com> wrote:
> 
> Hi,
> 
> I am exploring interfacing of files with QDataStream. But it does not seem to work. \
> To write to a file I do this: 
> file = QFile("file.dat")
> color = QColor(Qt.red)
> 
> if file.open(QIODevice.WriteOnly):
> out =  QDataStream(file)
> out << color
> file.flush()
> file.close()
> It looks as if that the data gets written to the file. It is the reading where \
> there is a problem: 
> 
> file = QFile("file.dat")
> color = QVariant()
> 
> 
> if file.open(QIODevice.ReadOnly):
> out = QDataStream(file)
> out >> color
> print(color)
> print(color.value())
> The output is: 
> <PyQt5.QtCore.QVariant object at 0x7f2cdd556f28>
> None
> 
> What am I doing wrong?

Instead of...

color = QVariant()

...do...

color = QColor()

Phil

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