当我点击图形中的某个点时，我试图获取列表类型中的坐标。我在stackoverflow中得到了这个示例代码，但是我不能打印列表或者从回调函数中访问它，我该怎么做呢？

import numpy as np
import plotly.express as px
import plotly.graph_objects as go
import ipywidgets as widgets
from pathlib import Path
import json

x = np.random.uniform(-10, 10, size=50)
y = np.sin(x)
clicked = []

# construct figure that has holders for points, interpolated line and final lines

fig = go.FigureWidget(
    [
        go.Scatter(x=x, y=y, mode="markers", name="base_points"),
    ]
)
fig.update_layout(template="simple_white")

out = widgets.Output(layout={"border": "1px solid black"})
out.append_stdout("Output appended with append_stdout\n")

# create our callback function

@out.capture()
def base_click(trace, points, selector):
    global clicked
    clicked.append(points.__dict__)

fig.data[0].on_click(base_click)

widgets.HBox([fig, out])

我想访问单击的列表并使用数据，但我无法访问它，也无法在控制台上打印它。