dash_core_components_quickstart_dropdown_slider_checkbox_callback.py

1from dash import Dash, html, dcc, callback, Output, Input
2
3app = Dash(__name__)
4
5app.layout = html.Div([
6    html.Label('Dropdown'),
7    dcc.Dropdown(['New York City', 'Montréal', 'San Francisco'], 'Montréal', id='dropdown'),
8
9    html.Br(),
10    html.Label('Multi-Select Dropdown'),
11    dcc.Dropdown(['New York City', 'Montréal', 'San Francisco'], ['Montréal', 'San Francisco'], multi=True),
12
13    html.Br(),
14    html.Label('Radio Items'),
15    dcc.RadioItems(['New York City', 'Montréal', 'San Francisco'], 'Montréal'),
16
17    html.Br(),
18    html.Label('Checkboxes'),
19    dcc.Checklist(['New York City', 'Montréal', 'San Francisco'], ['Montréal', 'San Francisco']),
20
21    html.Br(),
22    html.Label('Slider'),
23    dcc.Slider(min=0, max=9, marks={i: f'Label {i}' if i == 1 else str(i) for i in range(10)}, value=5),
24
25    html.Br(),
26    html.Label('Input'),
27    dcc.Input(value='MTL', type='text', id='input-text'),
28    html.Div(id='output-text')
29])
30
31@callback(
32    Output('output-text', 'children'),
33    Input('input-text', 'value')
34)
35def update_output(value):
36    return f'You have entered: {value}'
37
38if __name__ == '__main__':
39    app.run(debug=True)