Bokeh Interactive 图例隐藏多个字形

我已为我的数据集启用隐藏图例选项。当我点击它时，只有一个条消失，其他条保留。我不太确定是什么导致了这个问题。

这是之前和之后的条形图：

.

我的数据如下所示：

这是代码：

p = Bar(output,'Programs',values="Averages", group="University",plot_width=600,plot_height=400, title="Comparison")
p.legend.click_policy="hide"
output_file("bar.html")
show(p)

目前（Bokeh 0.12.6）不可能通过以下方式隐藏所有条形legend.click_policy="hide"，如所述文档 http://bokeh.pydata.org/en/latest/docs/user_guide/interaction/legends.html:

交互式图例功能目前适用于“每个字形”图例。通过指定自动分组的列创建的图例尚不支持下述功能

但是，可以通过添加来隐藏栏复选框组() http://bokeh.pydata.org/en/latest/docs/reference/models/widgets.groups.html#bokeh.models.widgets.groups.CheckboxGroup使用 CustomJS 在单击复选框时隐藏栏。下面你可以看到一个MCVE https://stackoverflow.com/help/mcve，这也是作为 Jupyter Notebook 在线提供 https://kyso.io/tuomastik/bokeh_interactive_legend_hide_multiple_glyphs:

import numpy as np
from bkcharts import Bar, show
from bokeh.layouts import column
from bokeh.models import CheckboxGroup, CustomJS

data = {'University': ['ENGT'] * 3 + ['UBC'] * 3,
        'Averages': [76.5, 79.9, 72.2, 71, 72, 69],
        'Programs': ['CHML', 'CIVL', 'CPEN', 'CHML', 'CIVL', 'CPEN']}

group = "University"
bars = Bar(data=data, label='Programs', values="Averages", group=group,
           plot_width=600, plot_height=400, title="Comparison")

checkboxes = CheckboxGroup(labels=np.unique(data[group]).tolist(),
                           # Make all checkboxes checked by default
                           active=list(range(np.unique(data[group]).size)))
checkboxes.callback = CustomJS(args=dict(bars=bars), code="""

var group = '%s';

function change_bars_visibility(checkbox_name, visible) {
    for (j = 0; j < bars.renderers.length; j++) {
        // Go through rendered objects

        if (bars.renderers[j].attributes.hasOwnProperty('data_source') && 
            bars.renderers[j].data_source.data[group][0] === checkbox_name) {

            // Change the visibility of this rendered object if it belongs to
            // the group determined by the checkbox that was clicked
            bars.renderers[j].visible = visible;
        }
    }
}

for (i = 0; i < cb_obj.labels.length; i++) {
    // Go through checkbox labels
    var checkbox_name = cb_obj.labels[i];

    if (cb_obj.active.indexOf(i) >= 0) {
        // alert(checkbox_name + " is activated");
        change_bars_visibility(checkbox_name, true);
    }
    else {
        // alert(checkbox_name + " is disabled");
        change_bars_visibility(checkbox_name, false);
    }
}
""" % group)

show(column(bars, checkboxes))