如何通过回调将dash绘图组件抽象到另一个文件中？

# plot_utils.py

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

def plot_callback(input_data):
    # 数据处理和绘图操作
    # ...

    # 创建绘图组件的布局和数据
    layout = html.Div([
        dcc.Graph(
            id='plot',
            figure={
                'data': [
                    go.Scatter(
                        x=x_data,
                        y=y_data,
                        mode='lines',
                        name='line'
                    )
                ],
                'layout': go.Layout(
                    title='Plot',
                    xaxis={'title': 'X'},
                    yaxis={'title': 'Y'}
                )
            }
        )
    ])

    return layout

# main.py

import dash
import dash_core_components as dcc
import dash_html_components as html
from plot_utils import plot_callback

app = dash.Dash(__name__)

app.layout = html.Div([
    # 其他组件
    # ...

    # 调用绘图组件的回调函数
    plot_callback(input_data)
])

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