On Donnerstag, 22. April 2010, Mark Summerfield wrote:
> Hi,
>
> I'm starting to convert the examples from my PyQt book to Python 3 with
> API 2. Perhaps I'm not awake yet, but I'm puzzled by this:
>
> Python 3.1.2 (r312:79147, Mar 25 2010, 07:42:02)
> [GCC 4.4.1] on linux2
> Type "copyright", "credits" or "license()" for more information.
>
> >>> from PyQt4.QtCore import *
> >>> from PyQt4.QtGui import *
> >>> PYQT_VERSION_STR
>
> '4.7.3'
>
> >>> QT_VERSION_STR
>
> '4.6.1'
>
> >>> fh = QFile("/tmp/data")
> >>> fh.open(QIODevice.WriteOnly)
>
> True
>
> >>> out = QDataStream(fh)
> >>> out.writeString("hello")
>
> Traceback (most recent call last):
> File "<pyshell#5>", line 1, in <module>
> out.writeString("hello")
> TypeError: QDataStream.writeString(str): argument 1 has unexpected type
> 'str'
This should be
>>> out.writeString("hello".encode())
i.e. it must be converted to a bytes object.
>
> And also by this:
> >>> fh = QFile("/tmp/data")
> >>> fh.open(QIODevice.WriteOnly)
>
> True
>
> >>> out = QDataStream(fh)
> >>> out << "hello"
You should use writeString(). When I ported eric to Python3, I stumbled over
both these issues.
>
> Traceback (most recent call last):
> File "<pyshell#11>", line 1, in <module>
> out << "hello"
> ValueError: string of length 1 expected
>
> What am I missing here?
>
Detlev
--
Detlev Offenbach
det...@die-offenbachs.de
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