code: def mouseDoubleClickEvent(self, event):
          
          index_clicked = self.indexAt(event.pos())
          if index_clicked.isValid():
              row = index_clicked.row()
              # TODO: Remove hard coded "Value" column number (3 here)
              index_clicked = index_clicked.child(row, 3)
              self.edit(index_clicked)
          else:
              event.accept()
docs: Reimplement Qt method