在单击ipywidgets按钮时分配变量。button.on_click事件

import ipywidgets as widgets
from IPython.display import display

button = widgets.Button(description="点击我")
output = widgets.Output()

def on_button_clicked(b):
    global my_variable
    my_variable = b.description

    with output:
        print("变量已分配：", my_variable)

# 将回调函数与按钮的on_click事件绑定
button.on_click(on_button_clicked)

display(button, output)