Hye everybody !

I still have a problem with my proxy.
I try to change my data root (as suggested earlier) so I redefine a new index method (to use my new data root) in my proxy as this (I repeat: it's python):
Qt Code: 
  1. class QtgProxyModel(QtGui.QSortFilterProxyModel):
  2.     def __init__(self, model, newIndexRoot=None):
  3.         super(QtGui.QSortFilterProxyModel, self).__init__()
  4.  
  5.         #======= Attributes Declaration =========
  6.         # We init the root of the proxy
  7.         self._data = model.getNodeFromIndex(newIndexRoot) # the data root
  8.         self._dObject = self._data.dDocObject  # the dictonary of all children item
  9.         #========================================
  10.  
  11.         self.setSourceModel(model)
  12.  
  13.     def index(self, row, column, parent):
  14.         if not parent.isValid():
  15.             parentNode = self._data
  16.         else:
  17.             parentNode = self._dObject[parent.internalId()]
  18.  
  19.         childItem = self._dObject[id(parentNode.getChildFromNum(row))]
  20.         if childItem is not None:
  21.             return self.createIndex(row, column, id(childItem))
  22.         else:
  23.             return QtCore.QModelIndex()
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But, when launch my application, it just stop. I'm running on window, and DrWatson give an unreadable report.

After debugging, the only thing I know, is that the application blow away at line 21 at the "createIndex" call.

Do I do the right thing ? If not, how should I do it (I read C++ too )?
Is it a PyQt bug ?

Thanks