使用dash DataTable的回调创建工具提示

import dash
import dash_html_components as html
import dash_table
from dash.dependencies import Input, Output

app = dash.Dash(__name__)

data = [
    {'Name': 'John', 'Age': 25, 'Country': 'USA'},
    {'Name': 'Emily', 'Age': 30, 'Country': 'Canada'},
    {'Name': 'Tom', 'Age': 35, 'Country': 'UK'}
]

columns = [{'name': 'Name', 'id': 'Name'}, {'name': 'Age', 'id': 'Age'}, {'name': 'Country', 'id': 'Country'}]

datatable = dash_table.DataTable(
    data=data,
    columns=columns,
    id='datatable'
)

@app.callback(
    Output('datatable', 'data'),
    [Input('datatable', 'active_cell')]
)
def update_tooltip(active_cell):
    if active_cell:
        row = active_cell['row']
        column = active_cell['column_id']
        tooltip = f"Row: {row}, Column: {column}"
        data[row][column] = tooltip
    return data

app.layout = html.Div([
    datatable
])

if __name__ == '__main__':
    app.run_server(debug=True)