[PyQt] Overriding QStandardItem with __iter__ in PyQt5

[Florian Bruhin]

Hey,

* triccare triccare <triccare at gmail.com> [2016-10-25 11:15:28 -0400]:
> Greetings,
> 
> Below is the code in question. Basically, I am adding an __iter__ property
> to QStandardItem. In PyQt4, this worked fine. However, in PyQt5, the text
> of the item no longer appears in the QTreeView. The item is there; you can
> select it. It just doesn't show.
> 
> PyQt5.QtGui.QStandardItem does not appear to natively have an __iter__
> property, so not sure why this is having such an effect.

This is quite interesting... If you add a traceback.print_stack()
here:

>     def __iter__(self):
>         for row in range(self.rowCount()):
>             yield self.child(row)

It seems like it gets called when doing model.appendRow(li).

Looking at Qt's documentation, QStandardItemModel::appendRow can be
called with a QStandardItem, or a list of QStandardItems. I'm guessing
since your custom class implements __iter__, it's treated like a list
of QStandardItems (because how would PyQt know the difference
otherwise?)

Florian

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