如何在Dash中对同一URL路径进行多个导航

import dash
from dash import dcc, html
from dash.dependencies import Input, Output

app = dash.Dash(__name__)

app.layout = html.Div([
    dcc.Location(id='url', refresh=False),
    html.Div(id='page-content')
])

# 第一个回调函数，处理URL路径为'/page1'的情况
@app.callback(Output('page-content', 'children'),
              [Input('url', 'pathname')])
def display_page1(pathname):
    if pathname == '/page1':
        return html.Div([
            html.H1('Page 1'),
            dcc.Link('Go to Page 2', href='/page2'),
            dcc.Link('Go to Page 3', href='/page3')
        ])
    return ''

# 第二个回调函数，处理URL路径为'/page2'的情况
@app.callback(Output('page-content', 'children'),
              [Input('url', 'pathname')])
def display_page2(pathname):
    if pathname == '/page2':
        return html.Div([
            html.H1('Page 2'),
            dcc.Link('Go to Page 1', href='/page1'),
            dcc.Link('Go to Page 3', href='/page3')
        ])
    return ''

# 第三个回调函数，处理URL路径为'/page3'的情况
@app.callback(Output('page-content', 'children'),
              [Input('url', 'pathname')])
def display_page3(pathname):
    if pathname == '/page3':
        return html.Div([
            html.H1('Page 3'),
            dcc.Link('Go to Page 1', href='/page1'),
            dcc.Link('Go to Page 2', href='/page2')
        ])
    return ''

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