在bokeh中的饼图按钮中添加标签

from bokeh.plotting import figure, show
from bokeh.models import HoverTool
from bokeh.palettes import Category10
from bokeh.io import output_notebook

# 创建饼图数据
data = {
    'categories': ['Category 1', 'Category 2', 'Category 3'],
    'values': [30, 40, 50]
}

# 创建饼图
p = figure(plot_height=400, plot_width=400, toolbar_location=None,
           tools='hover', tooltips='@categories: @values')

# 添加饼图数据
p.wedge(x=0, y=0, radius=0.4,
        start_angle=0, end_angle=data['values'][0]/sum(data['values'])*2*3.14159,
        color=Category10[3][0], legend_label=data['categories'][0])

p.wedge(x=0, y=0, radius=0.4,
        start_angle=data['values'][0]/sum(data['values'])*2*3.14159, end_angle=data['values'][1]/sum(data['values'])*2*3.14159,
        color=Category10[3][1], legend_label=data['categories'][1])

p.wedge(x=0, y=0, radius=0.4,
        start_angle=data['values'][1]/sum(data['values'])*2*3.14159, end_angle=2*3.14159,
        color=Category10[3][2], legend_label=data['categories'][2])

# 添加hover工具
hover = p.select(dict(type=HoverTool))
hover.tooltips = [('Category', '@categories'), ('Value', '@values')]

# 显示饼图
output_notebook()
show(p)