Bokeh:DataTable - 如何设置选定的行

Question

我想以编程方式更改DataTable对象行选择(没有JS,只是python).我试图使用selected底层ColumnsSource 的属性,但没有成功.如何才能做到这一点？

Answer 1

请参阅示例应用程序（需要运行散景服务），其中按下按钮会更改选定的行，然后更新表格和绘图。这是您需要的全部功能吗？

顺便说一句，你可以只用 JS 来做，而不需要使用 bokeh 服务器，但如果你有更多的 python 功能，那么我想你需要它。

from datetime import date
from random import randint

from bokeh.io import output_file, show, curdoc
from bokeh.plotting import figure
from bokeh.layouts import widgetbox, row
from bokeh.models import ColumnDataSource
from bokeh.models.widgets import DataTable, DateFormatter, TableColumn,Button

output_file("data_table.html")

data = dict(
        dates=[date(2014, 3, i+1) for i in range(10)],
        downloads=[randint(0, 100) for i in range(10)],
    )

def update():
    #set inds to be selected
    inds = [1,2,3,4]
    source.selected = {'0d': {'glyph': None, 'indices': []},
                                '1d': {'indices': inds}, '2d': {}}
    # set plot data
    plot_dates = [data['dates'][i] for i in inds]
    plot_downloads = [data['downloads'][i] for i in inds]
    plot_source.data['dates'] = plot_dates
    plot_source.data['downloads'] = plot_downloads


source = ColumnDataSource(data)
plot_source = ColumnDataSource({'dates':[],'downloads':[]})


table_button = Button(label="Press to set", button_type="success")
table_button.on_click(update)
columns = [
        TableColumn(field="dates", title="Date", formatter=DateFormatter()),
        TableColumn(field="downloads", title="Downloads"),
    ]
data_table = DataTable(source=source, columns=columns, width=400, height=280)

p = figure(plot_width=400, plot_height=400)

# add a circle renderer with a size, color, and alpha
p.circle('dates','downloads',source=plot_source, size=20, color="navy", alpha=0.5)


curdoc().add_root(row([table_button,data_table,p]))