SSCCE for http://stackoverflow.com/questions/12395296/typeerror-could-not-convert

pyside_typeerror.py

from PySide import QtGui
from PySide.QtGui import QCheckBox,QGraphicsLayoutItem
import sys

class Editor(QGraphicsLayoutItem):
    def __init__(self, name):
        QGraphicsLayoutItem.__init__(self)
    def update_value(self, value):
        pass

class BooleanEditor(Editor, QCheckBox):
    def __init__(self, value):
        Editor.__init__(self, "foo")
        QCheckBox.__init__(self)

        self.update_value(value)

    def update_value(self, value):
        self.old_value = value
        self.setCheckState(value)  # Error occurs here. "value" will be boole


QtGui.QApplication(sys.argv)
BooleanEditor(True)

# Throws:
#  ...
#  File "pyside_typeerror.py", line 20, in update_value
#    self.setCheckState(value)  # Error occurs here. "value" will be boole
#TypeError: 'PySide.QtGui.QCheckBox.setCheckState' called with wrong argument types:
#  PySide.QtGui.QCheckBox.setCheckState(bool)
#Supported signatures:
#  PySide.QtGui.QCheckBox.setCheckState(PySide.QtCore.Qt.CheckState)


"""