Bokeh在多个回调之间共享变量

from bokeh.io import curdoc
from bokeh.layouts import column
from bokeh.models import ColumnDataSource
from bokeh.plotting import figure
from bokeh.models import Slider

# 创建ColumnDataSource对象
source = ColumnDataSource(data=dict(x=[], y=[]))

# 创建图表
plot = figure(plot_width=400, plot_height=400)
plot.circle(x='x', y='y', source=source)

# 创建回调函数
def update_data(attrname, old, new):
    # 从Slider中获取新的值
    value = slider.value
    
    # 更新数据
    x = [1, 2, 3, 4, 5]
    y = [value * i for i in x]
    source.data = dict(x=x, y=y)

# 创建Slider
slider = Slider(start=1, end=10, value=1, step=1, title="Value")
slider.on_change('value', update_data)

# 将图表和Slider组合在一起
layout = column(slider, plot)

# 将布局添加到文档中
curdoc().add_root(layout)