如何在条形图中制作下拉框？(Python/Plotly)

import plotly.graph_objects as go
from plotly.subplots import make_subplots

# 示例数据
categories = ['Category A', 'Category B', 'Category C']
values1 = [20, 30, 40]
values2 = [40, 50, 60]

# 创建子图
fig = make_subplots(rows=1, cols=1)

# 添加条形图
fig.add_trace(go.Bar(x=categories, y=values1, name='Values 1'))
fig.add_trace(go.Bar(x=categories, y=values2, name='Values 2'))

# 更新布局
fig.update_layout(title_text="Bar Chart with Dropdown", barmode='group')

# 添加下拉框
fig.update_layout(
    updatemenus=[
        dict(
            buttons=list([
                dict(label="Values 1",
                     method="update",
                     args=[{"visible": [True, False]},
                           {"title": "Bar Chart - Values 1"}]),
                dict(label="Values 2",
                     method="update",
                     args=[{"visible": [False, True]},
                           {"title": "Bar Chart - Values 2"}]),
                dict(label="Both",
                     method="update",
                     args=[{"visible": [True, True]},
                           {"title": "Bar Chart - Both"}])
            ]),
            direction="down",
            showactive=True,
        ),
    ]
)

# 显示图表
fig.show()