可编辑形状上的回调函数(Plotly-Dash)

import dash
import dash_core_components as dcc
import dash_html_components as html
from dash.dependencies import Input, Output

app = dash.Dash(__name__)

app.layout = html.Div([
    dcc.Graph(
        id='graph',
        figure={
            'data': [
                {'x': [1, 2, 3], 'y': [4, 1, 2], 'type': 'bar', 'name': 'A'},
                {'x': [1, 2, 3], 'y': [2, 4, 5], 'type': 'bar', 'name': 'B'},
            ],
            'layout': {
                'title': 'Bar Chart'
            }
        }
    )
])

@app.callback(
    Output('graph', 'figure'),
    [Input('graph', 'relayoutData')]
)
def update_shape(relayout_data):
    if 'shapes' in relayout_data:
        shapes = relayout_data['shapes']
        # 处理形状编辑的逻辑
        # ...
        # 返回更新后的figure
        return {
            'data': [
                {'x': [1, 2, 3], 'y': [4, 1, 2], 'type': 'bar', 'name': 'A'},
                {'x': [1, 2, 3], 'y': [2, 4, 5], 'type': 'bar', 'name': 'B'},
            ],
            'layout': {
                'title': 'Bar Chart (Updated)'
            }
        }
    else:
        return dash.no_update

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