Why Is My Qgraphicsitem Not Selectable?

I copied some code snippets and made my own version of it. The initial snippet (which I don't have anymore) allowed to move and also select a QgraphicsItem. My modified version all

Solution 1:

You miss this method in class GraphicsItem:

def mousePressEvent(self, event):
    # select object
    QtGui.QGraphicsItem.mousePressEvent(self, event)
    print (self) # show the selected item