如何在plotly-dash应用程序中绘制图形

import dash
import dash_core_components as dcc
import dash_html_components as html
import plotly.graph_objs as go

app = dash.Dash(__name__)

app.layout = html.Div(
    children=[
        html.H1('Plotly Dash应用程序'),
        dcc.Graph(
            id='example-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': '柱状图示例'
                }
            }
        )
    ]
)

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