(PyQt) User dictated row arrangment?

Hello.
WorkFlow:
[QAbstractTableModel]<===>[QtableView]

Vertical Header is moveable, and when the user enacts such functionality, the following is called (from QtableView):

Code:

---

self.tableView.verticalHeader().setMovable(True)
        self.tableView.verticalHeader().sectionMoved.connect(self.rowsChanged)
...
 
    def rowsChanged(self,dataRow,oldDisplayRow,newDisplayRow):
        self.tableData.resortRows(dataRow,oldDisplayRow,newDisplayRow)

---

QAbstractTableModel catches the call, and enacts the following:

Code:

---

def resortRows(self,dataRow,oldDisplayRow,newDisplayRow):
        print "you moved dataRow %s from displayRow %s to displayRow %s" % (dataRow,oldDisplayRow,newDisplayRow)
        self.rows.insert(newDisplayRow,self.rows.pop(dataRow))
        self.layoutChanged.emit()

---

While the underlying data structure (self.rows) is properly rearranged, the QtableView does not reflect these changes - and rather exhibits random offsetting of rows; non-synchronous with the ACTUAL changes made.




Are the 'beginInsertRows(...)/endInstertRows()' and 'beginRemoveRows(...)/endRemoveRows()' nessecary?
As when I implement these as follows, neither the QtableView, nor the underlying data (self.rows) is properly altered:

Code:

---

def resortRows(self,dataRow,oldDisplayRow,newDisplayRow):
        print "you moved dataRow %s from displayRow %s to displayRow %s" % (dataRow,oldDisplayRow,newDisplayRow)
        self.beginInsertRows(QtCore.QModelIndex(),newDisplayRow,newDisplayRow)
        self.rows.insert(newDisplayRow,self.rows[dataRow])
        self.endInsertRows()
        self.beginRemoveRows(QtCore.QModelIndex(),dataRow,dataRow)
        self.rows.pop(dataRow)
        self.endRemoveRows()

---

A billion thanks!

---

Added after 23 minutes:

Doh!

Not yet sure if this is the most elegant manner, but implementing the following in QAbstractModel solved the problems (for now):

Code:

---

def resortRows(self,dataRow,oldDisplayRow,newDisplayRow):
        print "you moved dataRow %s from displayRow %s to displayRow %s" % (dataRow,oldDisplayRow,newDisplayRow)
        cacheData = self.rows[dataRow]
        self.removeRows(dataRow)
        self.beginInsertRows(QtCore.QModelIndex(),newDisplayRow,newDisplayRow)
        self.rows.insert(newDisplayRow,cacheData)
        self.endInsertRows()

---

Code:

---

# removes row from model (only if entire row-children are selected)
    def removeRows(self, row):
        self.beginRemoveRows(QtCore.QModelIndex(),row,row)
        self.rows.pop(int(row))
        self.endRemoveRows()

---