如何使用Bokeh绘制堆叠条形图？

from bokeh.io import output_file, show
from bokeh.plotting import figure
from bokeh.transform import factor_cmap
from bokeh.models import ColumnDataSource

data = {'categories': ['Category A', 'Category B', 'Category C'],
        'group1': [10, 15, 8],
        'group2': [5, 3, 12],
        'group3': [7, 9, 10]}

source = ColumnDataSource(data=data)

p = figure(x_range=data['categories'], plot_height=350, title='Stacked Bar Chart')
p.vbar_stack(['group1', 'group2', 'group3'], x='categories', width=0.8, color=['#c9d9d3', '#718dbf', '#e84d60'], source=source, legend_label=['Group 1', 'Group 2', 'Group 3'])

p.y_range.start = 0
p.xgrid.grid_line_color = None
p.legend.location = 'top_left'
p.legend.orientation = 'horizontal'
p.xaxis.axis_label = 'Categories'
p.yaxis.axis_label = 'Count'

output_file('stacked_bar_chart.html')  # 输出文件路径
show(p)  # 显示图表