pyqt5 and multiple inheritance - python-3.x

Question

I'd like to create a new class that inherits two subclasses of QWidget. I know multi-inheritance isn't possible in pyqt, but how could I manage to have the properties of both parent classes in one subclass?
What I wish I could do is as follows:
class A(QWidget):
def __init__(self, widget, parent=None):
widget.destroyed.connect(self.destroy_handler)
#pyqtSlot()
def destroy_handler(self):
pass
class B (A, QStatusBar):
def __init__(self, widget, parent=None):
A.__init__(self, widget)
QStatusBar.__init__(self, parent)
#pyqtSlot()
def destroyed_handler(self):
print("Destroyed")

Answer 1

I finally found how to do it: first of all, the problems came from A and QStatusBar inheriting QWidget. We can't change QStatusBar, so we must changer A.
A shouldn't inherit QWidget: so let's create another class, AInterface, like that:
class AInterface(QObject):
def __init__(self, a, parent=None)
super().__init__(parent=parent)
self.a = a
self.connect_signal()
def connect_signal(self, widget):
widget.destroyed.connect(self.handler)
#pyqtSlot()
def handler(self):
self.a.handler()
A has now the following implementation:
class A:
def __init__(self, widget):
a.widget = widget
a.interface = AInterface(self)
def handler(self):
pass
Thus, now we can create subclasses inheriting not only A but also any QObject, like this:
class B(QStatusBar, A):
def __init__(self, widget, parent=None):
QStatusBar.__init__(self, parent=parent, wiget=widget)
A.__init__(self, widget)
def handler(self):
self.show('Destroyed', 3000)
Notice the widget=widget in the constructor of QStatusBar: if we don't specify it, a TypeError is thrown...