How to get Click Event of QLineEdit in Qt?

I used this solution many times

def clickable(widget): # make this function global
    class Filter(QObject):
        clicked = pyqtSignal()

        def eventFilter(self, obj, event):
            if obj == widget and event.type() == QEvent.MouseButtonRelease and obj.rect().contains(event.pos()):
                self.clicked.emit()
                return True
            else:
                return False
    filter = Filter(widget)
    widget.installEventFilter(filter)
    return filter.clicked

clickable(self.lineedit).connect(self.test) #use this in class

def test(self):
    print("lineedit pressed")
    pass

Just use the Pushbutton clicked event. Change the backcolor of the Pushbutton into Transparent then remove the text of it. Lay it in front of the LineEdit then use the setfocus property of the LineEdit when the push button was clicked. That's the easiest way to get the clicked event and use it in LineEdit..