我正在尝试为我的Bokeh应用程序制作一个基本的搜索工具。基本过程是:
用户在 TextInput 小部件中输入搜索词。
TextInput 值传递给搜索功能,该值返回 MultiSelect 小部件的(元组)选项列表。
我使用本地服务器运行应用程序:
bokeh serve --show my_app
我无法通过回调更新 MultiSelect 选项。
def createtab_search():
# callback text_input
def callback_text_input(attr, old, new):
print("Previous label: " + old)
print("Updated label: " + new)
text_input = TextInput(value="search here", title="Search:")
text_input.on_change("value", callback_text_input)
# callback search results
def callback_search_result(attr,old,new):
search_results = search_function(text_input.value)
options = [(k,k) for k in search_results.items()]
multi_select.options = options
# results dropdown
multi_select = MultiSelect(title="Results:",
value=[],
options=[])
multi_select.on_change("options",callback_search_result)
# Layout setup
layout = column(text_input,multi_select)
#output tab
tab = Panel(child = layout, title = 'Search')
return tab
答案 0 :(得分:0)
我通过从第一个内部调用第二个回调来解决此问题。因此,每当我在 TextInput 中更新搜索词时,就会调用搜索功能,并重新填充 MultiSelect 小部件选项。
def createtab_search():
# callback text_input
def callback_text_input(attr, old, new):
callback_search_result(attr, old, new)
text_input = TextInput(value="search here", title="Search:")
text_input.on_change("value", callback_text_input)
# callback search results
def callback_search_result(attr,old,new):
search_results = search_function(text_input.value)
options = [(k,k) for k in search_results.items()]
multi_select.options = options
# results dropdown
multi_select = MultiSelect(title="Results:",
value=[],
options=[])
multi_select.on_change("options",callback_search_result)
# Layout setup
layout = column(text_input,multi_select)
#output tab
tab = Panel(child = layout, title = 'Search')
return tab