使用 jupyter 小部件动态生成与搜索相结合的复选框

Question

我已经构建了一个 jupyter notebook 来分析和对比历史数据。因为数据库非常大，我使用了搜索+观察小部件来允许用户选择他们想要的实验，而不是滚动浏览所有数据。现在所有实验的所有复选框都已生成，但这既太大而无法放入盒子中，并且占用了大量时间。

有没有办法默认只显示最后 10 个实验，并且只在搜索后生成所需的复选框？

我基于此gist 编写代码。我已经尝试将复选框小部件移动到 else 循环中，但这不起作用。此外，我的代码中的全局/局部变量情况似乎很混乱。

import ipywidgets as widgets

#Generate a dummy list
Allfileslist = ["Experiment {}".format(x) for x in range(600)]
#Search box + generate ALL the checkboxes, this seems to be the bottleneck
search_widget = widgets.Text(placeholder='Type for older experiments',                 description= 'Search:')
experiments = {eachfilename: widgets.Checkbox(description=eachfilename, value=False) for eachfilename in Allfileslist}
options = [experiments[eachfilename] for eachfilename in Allfileslist]
options_widget = widgets.VBox(options, layout={'overflow': 'auto'})


def whentextischanged (change):
    """Dynamically update the widget experiments"""
    search_input = change['new']
    if search_input == '':
        # Reset search field, default to last 9 experiments
        new_options = [experiments[eachfilename] for eachfilename in Allfileslist[-10:]]
    else:
        # Filter by search
        close_matches = [x for x in Allfileslist if search_input.upper() in x]
        ### magic code that generates only the match boxes ###
        new_options = [experiments[eachfilename] for eachfilename in close_matches]

    options_widget.children = new_options

#Generate the vbox, search
multi_select = widgets.VBox([search_widget, options_widget])
search_widget.observe(whentextischanged, names='value')
#serve it up
multi_select

有没有办法只生成加快速度所需的复选框？

更新 我将 ac24 的答案与一些修改结合起来，它几乎可以满足它的需要。唯一没有的是在搜索框一开始为空时显示默认值。之后，清除搜索框会显示正确的行为。

import ipywidgets as widgets

#Generate a dummy list
Allfileslist = ["{}".format(x) for x in range(600)]
#Search box + generate some checboxes
search_widget = widgets.Text(placeholder='Type for older experiments', description= 'Search:',value='')
experiments = {}
options_widget = widgets.VBox(layout={'overflow': 'auto'})
default_options = [widgets.Checkbox(description=eachfilename, value=False) for eachfilename in Allfileslist[-10:]]

def whentextischanged (change):
    """Dynamically update the widget experiments"""
    search_input = change['new']
    if search_input == '':
        # Reset search field, default to last 9 experiments
        new_options = default_options
    else:
        # Filter by search
        close_matches = [x for x in Allfileslist if search_input.lower() in x.lower()][:10]
        for name in close_matches:
            if name not in experiments:
                experiments[name] = widgets.Checkbox(description=name, value=False)
        new_options = [experiments[eachfilename] for eachfilename in close_matches]

    options_widget.children = new_options

#Generate the vbox, search
multi_select = widgets.VBox([search_widget, options_widget])
search_widget.observe(whentextischanged, names='value')
multi_select

Answer 1

尝试先创建一个空字典，然后在您接近所需的实验选择时使用复选框填充。

import ipywidgets as widgets

#Generate a dummy list
Allfileslist = ["{}".format(x) for x in range(600)]
#Search box + generate ALL the checkboxes, this seems to be the bottleneck
search_widget = widgets.Text(placeholder='Type for older experiments',                 description= 'Search:')
# experiments = {eachfilename: widgets.Checkbox(description=eachfilename, value=False) for eachfilename in Allfileslist}
experiments = {}
options_widget = widgets.VBox(layout={'overflow': 'auto'})


def whentextischanged (change):
    """Dynamically update the widget experiments"""
    search_input = change['new']
    if search_input == '':
        # Reset search field, default to last 9 experiments
        new_options = [experiments[eachfilename] for eachfilename in Allfileslist[-10:]]
    else:
        # Filter by search
        close_matches = [x for x in Allfileslist if search_input.lower() in x.lower()][:10]
        for name in close_matches:
            if name not in experiments:
                experiments[name] = widgets.Checkbox(description=name, value=False)

        ### magic code that generates only the match boxes ###
        new_options = [experiments[eachfilename] for eachfilename in close_matches]

    options_widget.children = new_options

#Generate the vbox, search
multi_select = widgets.VBox([search_widget, options_widget])
search_widget.observe(whentextischanged, names='value')
#serve it up
multi_select

然后，一旦您选择了几个选项，请致电 [key for key, exp_check in exp_checkboxes.items() if exp_check.value] 以查看选择的值。