Dash Callbacks.py

@app.callback(Output(component_id='graph', component_property= 'figure'),
              [Input(component_id='dropdown', component_property= 'value')])

def graph_update(dropdown_value):
    fig = px.scatter(df[df["species"]==dropdown_value], x="sepal_width", y="sepal_length")
    
    fig.update_layout(title = 'Sapel Length and Width of Different Species',
                      xaxis_title = 'Sepal Width',
                      yaxis_title = 'Sepal Length')
    return fig