QStringDecoder 在 PySide6 中不可调用

Question

I can't get the example from the PySide6 documentation working on my system. I am running PySide-6.2 on Ubuntu.

toUtf16 = QStringDecoder(QStringConverter.Utf8)
toUtf16('test')

Result:

TypeError: 'PySide6.QtCore.QStringDecoder' object is not callable

Answer 1

It looks like a bug in PySide6. The returned object only has the inherited methods from QStringConverter , as can be seen by using dir :

>>> dec = QtCore.QStringDecoder(QtCore.QStringConverter.Encoding.Utf16)
>>> for x in dir(dec):
...     if x[0].islower(): print(x)
...
hasError
isValid
name
nameForEncoding
requiredSpace
resetState
state

So the decode methods are missing, and the TypeError indicates that the () -operator overload is missing as well. The QStringEncoder class has similar problems.

In PyQt6, everything works as expected:

>>> enc = QtCore.QStringEncoder(QtCore.QStringConverter.Encoding.Utf16)
>>> dec = QtCore.QStringDecoder(QtCore.QStringConverter.Encoding.Utf16)
>>> x = enc('text')
>>> x
PyQt6.QtCore.QByteArray(b't\x00e\x00x\x00t\x00')
>>> dec(x)
'text'

Of course, you don't really need to use these Qt classes, since the equivalent functionality already exists in Python.