Question

我想以编程方式更改DataTable对象行选择（不使用JS，只需python）。我试图使用底层ColumnsSource的selected属性，但没有成功。怎么办呢？

Answer 1

查看示例应用程序（需要散景服务才能运行），按下按钮可更改所选行，然后更新表格和绘图。这是您需要的所有功能吗？

顺便说一句，你可以在JS中完成它而不需要使用散景服务器，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]))

Answer 2

为了清楚起见，您必须完全替换source.selected属性以触发更改。所以重要的一点是：

source.selected = {'0d': {'glyph': None, 'indices': []},
                            '1d': {'indices': inds}, '2d': {}}

单独设置source.selected中的项目不起作用

source.selected['1d']['indices'] = inds # Doesn't work

Answer 3

您可以通过以下方式在python中以编程方式选择class Image < ApplicationRecord has_attached_file :item_image, styles: { medium: "300x300>", thumb: "100x100>" }, default_url: "/images/:style/missing.png" validates_attachment_content_type :item_image, content_type: /\Aimage\/.*\z/ def item_image_url self.item_image.url(:original) end end行：

DataTable

其中source.selected.indices = [list of indices to be selected]是source的{{1}}。如果您在ColumnDataSource处有任何回调，请记住只有在注册了回调之后才选择行，这样它们才能被调用。

Bokeh：DataTable - 如何设置选定的行

3 个答案: