Plotly Dash URL路由到当前页面中的id

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

@app.callback(Output('page-content', 'children'),
              [Input('url', 'pathname')])
def display_page(pathname):
    if pathname == '/':
        return html.Div([
            html.H1('首页'),
            # 在这里添加首页的内容
        ])
    elif pathname == '/page1':
        return html.Div([
            html.H1('页面1'),
            # 在这里添加页面1的内容
        ])
    elif pathname == '/page2':
        return html.Div([
            html.H1('页面2'),
            # 在这里添加页面2的内容
        ])
    else:
        return '404 页面未找到'

html.Div([
    dcc.Link('首页', href='/'),
    dcc.Link('页面1', href='/page1'),
    dcc.Link('页面2', href='/page2')
])