Python Dash数据表应仅显示选定的列

import dash
import dash_core_components as dcc
import dash_html_components as html
import pandas as pd

# 加载数据
data = pd.read_csv('data.csv')

# 创建Dash应用程序
app = dash.Dash(__name__)

# 定义应用程序布局
app.layout = html.Div([
    html.H1('数据表'),
    dcc.Dropdown(
        id='column-dropdown',
        options=[{'label': col, 'value': col} for col in data.columns],
        value=[],
        multi=True
    ),
    html.Table(id='data-table')
])

# 回调函数，根据用户选择显示选定的列
@app.callback(
    dash.dependencies.Output('data-table', 'children'),
    [dash.dependencies.Input('column-dropdown', 'value')]
)
def update_table(selected_columns):
    filtered_data = data[selected_columns]
    table = html.Table([
        html.Thead(html.Tr([html.Th(col) for col in filtered_data.columns])),
        html.Tbody([
            html.Tr([
                html.Td(filtered_data.iloc[i][col]) for col in filtered_data.columns
            ]) for i in range(len(filtered_data))
        ])
    ])
    return table

# 运行应用程序
if __name__ == '__main__':
    app.run_server(debug=True)