问Bokeh Python条件CheckboxGroup

EN

options_dict = {'a' : ['aa','bb','cc'], 'b' : ['dd','ee','ff']}
dropdown = Select(title="a dropdown menu:", options = ['a', 'b'], value='a')

# let all sub-options be the default option
checkbox = CheckboxGroup(labels=['aa','bb','cc','dd','ee','ff'], active=['aa','bb','cc','dd','ee','ff'])

# assume we have some function that is updating and fetching the value of the 'dropdown'

def select_something():
    selected_attribute = dropdown.value()
    return selected_attribute

def update():
    selected_attribute = select_something()
    # update the CheckBox contents - obviously Pseudo-code
    checkbox.labels = options_dict[selected_attribute]
    # and have all of them "pre-checked"
    checkbox.active = options_dict[selected_attribute]

dropdown.on_change('value', lambda attr, old, new: update())