class Class1:
    def __init__(self):
        """Constructor."""

    def get_location(self):
        canvas = iface.mapCanvas()
        clicked_points=canvas.setMapTool(Class2(self,canvas))
        print(clicked_points)
        iface.actionPan().trigger()

class Class2(QgsMapTool):
    def __init__(self,canvas):
        QgsMapTool.__init__(self, canvas)
        self.setCursor(Qt.CrossCursor)
        self.parent_class=parent_class

    def canvasReleaseEvent(self, event):
        return [event.pos().x(),event.pos().y()]