如何强制对我的Bokeh DataTable进行排序？

from bokeh.io import output_file, show
from bokeh.models import ColumnDataSource, DataTable, NumberFormatter, StringFormatter, StringEditor, NumberEditor, StringComparator, NumberComparator
from bokeh.layouts import layout
from bokeh.plotting import curdoc

# 创建数据源
data = {'name': ['Alice', 'Bob', 'Charlie'],
        'age': [25, 30, 35],
        'city': ['New York', 'London', 'Tokyo']}
source = ColumnDataSource(data)

# 创建DataTable
columns = [
    DataTable.Column(field='name', title='Name', editor=StringEditor(), formatter=StringFormatter(), sortable=True, default_sort='ascending', sort_field='name', sort_order='ascending', comparator=StringComparator()),
    DataTable.Column(field='age', title='Age', editor=NumberEditor(), formatter=NumberFormatter(), sortable=True, default_sort='ascending', sort_field='age', sort_order='ascending', comparator=NumberComparator()),
    DataTable.Column(field='city', title='City', editor=StringEditor(), formatter=StringFormatter(), sortable=True, default_sort='ascending', sort_field='city', sort_order='ascending', comparator=StringComparator())
]
data_table = DataTable(source=source, columns=columns, editable=True, index_position=-1)

# 创建布局
layout = layout([[data_table]])

# 显示结果
curdoc().add_root(layout)

data_table.sort('name', 'descending')