How do I use callbacks in Plotly Dash within Jupyter Notebook?

How do I use callbacks in Plotly Dash within Jupyter Notebook?

To use callbacks in Plotly Dash within Jupyter Notebook, you need to define your app layout and then create callback functions that update your components based on user interactions.

Can you show me a simple example of a callback?

Sure! Here's a basic example:

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

app = dash.Dash(__name__)

app.layout = html.Div([
    dcc.Input(id='input', value='initial value', type='text'),
    html.Div(id='output')
])

@app.callback(Output('output', 'children'), [Input('input', 'value')])
def update_output(value):
    return f'You entered: {value}'

if __name__ == '__main__':
    app.run_server(mode='inline')

What do I need to run this code in Jupyter Notebook?

You need to have the Dash library installed. You can install it using pip: !pip install dash. Also, ensure you are using a Jupyter environment that supports running Dash apps.