使用填充图案为vbar_stack导出bokeh中的svg

from bokeh.plotting import figure, output_file, save
from bokeh.models import ColumnDataSource
from bokeh.transform import factor_cmap
from bokeh.palettes import Category20

data = {
    'categories': ['Category 1', 'Category 2', 'Category 3'],
    'subcategories': ['Subcategory 1', 'Subcategory 2', 'Subcategory 3'],
    'values': [[10, 20, 30], [15, 25, 35], [5, 10, 15]]
}

source = ColumnDataSource(data=data)

p = figure(x_range=data['categories'], plot_height=400, plot_width=600, title='Stacked Bar Chart')

p.vbar_stack(stackers=data['subcategories'], x='categories', width=0.9, color=factor_cmap('subcategories', palette=Category20[3], factors=data['subcategories']), source=source)

p.xaxis.axis_label = 'Categories'
p.yaxis.axis_label = 'Values'
p.legend.title = 'Subcategories'
p.legend.location = 'top_right'
p.legend.orientation = 'vertical'

output_file('stacked_bar_chart.svg')
save(p)