PySide qsettings returns unicode

Question

Hey guys I have this problem with Qsettings when using Pyside. Whenever I try to retrieve a list which was stored earlier... I get back unicode. I've searched the problem online but there doesn't seem to be a solution concerning lists.

Thanks.. I'll try that out. Here's my code: settings = QtCore.Qsettings() notes = settings.value('recent_note_list', []) print type(notes) >>>> — Michael, Aug 07 '14 at 13:15
Sorry, didn't see your comment here. You could have also commented on my answer. Anyway, you can't store arbitrary python objects inside QSettings. Many languages have Qt bindings, and QSettings is abstracting over different formats. In case you want to store highly complex data, you could serialize it to JSON first and store it in a single value. Kinda defeats the purpose of QSettings' abstraction though. — Reiner Gerecke, Aug 14 '14 at 13:43

score 2 · Answer 1 · answered Aug 07 '14 at 12:24

According to the PySide documentation, in order to store a list/array in a QSettings Object, you need to do this:

mylist = ['a', 'b', 'c']

settings = QSettings()
settings.beginWriteArray("mylist")
for idx, value in enumerate(mylist):
    settings.setArrayIndex(i)
    settings.setValue("key", value)

settings.endArray()

As shown here: http://srinikom.github.io/pyside-docs/PySide/QtCore/QSettings.html#PySide.QtCore.PySide.QtCore.QSettings.beginWriteArray

To read it:

mylist = []

settings = QSettings()
size = settings.beginReadArray("mylist")
for i in range(size):
    settings.setArrayIndex(i)
    mylist.append(settings.value("key"))

settings.endArray()

As shown here: http://srinikom.github.io/pyside-docs/PySide/QtCore/QSettings.html#PySide.QtCore.PySide.QtCore.QSettings.beginReadArray

Perhaps you can show a sample of your code, so we can offer more help.

PySide qsettings returns unicode

1 Answers1