"underlying C/C++ object has been deleted" PyQt

[janosimas]

I've already asked this question in 'newbie' but with no answer, I'm trying here then.

I have list, self.cards, that is [QListWidgetItem, string, QString]
in this function I just iter the elements of this list and populate my QListView (self.cardList).

def updateCardList(self):
		for card_ in self.cards:
			self.cardList.addItem(card_[0])

def updateCardList(self):
		for card_ in self.cards:
			self.cardList.addItem(card_[0])

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It works fine for this function:

def selectEditionsF(self):
		self.cards=[]
		for sEdition in self.selectedEditions:
			for edition in self.listEditions:
				if sEdition == edition[0]:
					for card in edition[1].iter('card'):
						self.cards.append([QListWidgetItem(card.get('name')), card.get('graphics'), sEdition])
		self.updateCardList()
		self.selectEditionsWindow.close()

def selectEditionsF(self):
		self.cards=[]
		for sEdition in self.selectedEditions:
			for edition in self.listEditions:
				if sEdition == edition[0]:
					for card in edition[1].iter('card'):
						self.cards.append([QListWidgetItem(card.get('name')), card.get('graphics'), sEdition])
		self.updateCardList()
		self.selectEditionsWindow.close()

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but in this case:

def refine(self, bool):
                tempcards = self.cards
                self.cards = []
		for card in tempcards:
			if self.refineColor.isChecked():
				if self.colorBlue.isChecked():
					if self.getCardColor(card[0]) == "Blue":
						self.cards.append(card)
		self.updateCardList()

def refine(self, bool):
                tempcards = self.cards
                self.cards = []
		for card in tempcards:
			if self.refineColor.isChecked():
				if self.colorBlue.isChecked():
					if self.getCardColor(card[0]) == "Blue":
						self.cards.append(card)
		self.updateCardList()

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When it enters the loop in updateCardList I receive this message: "underlying C/C++ object has been deleted"
Debug I found that inside the function everything is Ok, the error appears just inside the loop.

Any Ideas?

[janosimas]

I found the cause but not the reason

(in the function I posted was missing a line

def updateCardList(self):
                self.cardList.clear()
		for card_ in self.cards:
			self.cardList.addItem(card_[0])

def updateCardList(self):
                self.cardList.clear()
		for card_ in self.cards:
			self.cardList.addItem(card_[0])

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when I cleared my self.cardList it deleted all items regardless if I had pointers for them or not.
I could solve it repopulating my self.cardList with new items identical but not the sames.

[amleto]

I found the cause but not the reason

(in the function I posted was missing a line

And this is why I wrote my sig

I guess you did soemthing wrong with pyqt ref count rules or something. Think about it - if you lost your only pointers to the c++ object, pyqt should clean up in c++, otherwise it is memory leak.