from PySide import QtGui, QtCore
from PySide.QtCore import Qt

import sys

class MyModel(QtCore.QAbstractListModel):
    def __init__(self, lst, parent=None):
        super(MyModel, self).__init__(parent)
        self.lst = lst

    def moveItem(self, fromi, toi):
        print "move %d->%d" % (fromi, toi)

        self.beginMoveRows(QtCore.QModelIndex(), fromi, fromi, QtCore.QModelIndex(), toi)
        
        item = self.lst.pop(fromi)
        self.lst.insert(toi, item)
        
        self.endMoveRows()
        
        print "done"

    def rowCount(self, parent=QtCore.QModelIndex()):
        return len(self.lst)
        
    def data(self, index, role=Qt.DisplayRole):
        if index.isValid():
            if role == Qt.DisplayRole:
                return str(self.lst[index.row()])

        return None

if __name__ == '__main__':
    app = QtGui.QApplication(sys.argv)
    
    lv = QtGui.QListView()
    lv.setModel(MyModel(["a", "b", "c"]))
    lv.show()
    
    lv.model().moveItem(1,0)
    lv.model().moveItem(0,1)

    app.exec_()