Can i make a option plotly dash?

Dash Python
1 
app = 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', 'search')
)

def url_check(search):
    project_key = re.search('project_key=(\w+)&', search).group(1)
    if project_key == 'U9sD0DItDJ0479kiFPG8':
        app.layout = html.Div([
            dcc.Dropdown(options=['bar', 'pie'], id='dropdown', multi=False, value='bar',
                         placeholder='Select graph type'),
            html.Div(id='page-content'),
        ])
        return app.layout


    else:
        app.layout = html.Div([
            html.Div('실패')
        ])
        return app.layout

This is my code
When i receive Url first
match Url and my code then want to show dropdown, graph
but dont match then show 실패
how to do that>?

2

Hello @limaa,

Instead of trying to change the whole layout, you just need to alter the div within the layout.

For example, have the layout = html.Div(id=‘layout’) then in your callback, have the target be ‘layout’,’children’.