如何从pyqtgraph中的散点图中获取各个点及其属性？

import pyqtgraph as pg
from pyqtgraph.Qt import QtCore, QtGui

app = QtGui.QApplication([])
win = pg.GraphicsWindow(title="Scatter Plot")

plot = win.addPlot()

import numpy as np
x = np.random.normal(size=100)
y = np.random.normal(size=100)

scatter = pg.ScatterPlotItem(x=x, y=y, size=10, pen=pg.mkPen(None), brush=pg.mkBrush(255, 255, 255, 120))
plot.addItem(scatter)

def mouseClick(event):
    pos = event.pos()
    points = scatter.pointsAt(pos)
    if len(points) > 0:
        point = points[0]
        print("Clicked point:", point.pos())
        print("Point attributes:", point.data())

plot.scene().sigMouseClicked.connect(mouseClick)

win.show()
app.exec_()