Replacing an empty graph with a message

Hi Alex
I am new to plotly dash and I don’t really understand where to add this piece of code.
Could you please give an example.

Below is how I am plotting my figure:

fig = px.scatter(df_plot[‘status_count’]).update_traces(mode=‘lines+markers’)
fig.add_bar(x=df_plot.index, y=df_plot[‘status_count’], name=“Active Sellers”, marker_color=‘rgb(255,204,0)’)

fig.update_layout(
    {
        'yaxis': {'title': 'No of Active Sellers'},
        'xaxis': dict(title='Months',
                      tickmode='array',
                      tickvals=df_plot.index,
                      ticktext=df_plot.index
                      ),
        'margin': dict(l=10, r=10, t=60, b=10)
    },
    showlegend=False,
    height=250
    # plot_bgcolor='rgb(204,255,255)'
)