Howdy, I have found that somewhere between 4.8.3 and 4.9.6, calling QTreeWidgetItem.addChild(item) no longer creates a reference to the specified item (or, at least that is my best guess as to what's going on). I noticed this because I often assign custom attributes to these items and found that the attributes go missing under 4.9.6 if I don't keep an explicit reference to the item.
Here's an example from 4.8.3: >>> from PyQt4.QtGui import * >>> app = QApplication([]) >>> tree = QTreeWidget() >>> item = QTreeWidgetItem(["Item"]) >>> item.attr = "test" >>> tree.invisibleRootItem().addChild(item) >>> del item >>> import gc >>> gc.collect() 0 >>> tree.topLevelItem(0).attr 'test' ..and the same under 4.9.6: >>> from PyQt4.QtGui import * >>> app = QApplication([]) >>> tree = QTreeWidget() >>> item = QTreeWidgetItem(["Item"]) >>> item.attr = "test" >>> tree.invisibleRootItem().addChild(item) >>> del item >>> import gc >>> gc.collect() 0 >>> tree.topLevelItem(0).attr Traceback (most recent call last): File "<stdin>", line 1, in <module> AttributeError: 'QTreeWidgetItem' object has no attribute 'attr' Questions are: 1) Is this a bug, or was the change deliberate? 2) Does this apply only to QTreeWidgetItem, or are there similar changes elsewhere I should watch out for? Thanks! Luke
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