dash_tut_update_layout.py

# Create our app layout
app = dash.Dash(__name__)
server = app.server
app.layout = html.Div([
    html.H2('My Dash App'),
    dt.DataTable(
        id='my-datatable',
        rows=df_ag.to_dict('records'),
        editable=False,
        row_selectable=True,
        filterable=True,
        sortable=True,
        selected_row_indices=[]
    ),
    html.Div(id='selected-indexes'),
    dcc.Graph(
        id='datatable-subplots'
    ),
    # +++++++++ START UPDATED APP LAYOUT FOR QUERY BUTTON ++++++++++
    html.Div(id='container-query-button', children=[
        html.Button('Run Query', id='button-query', disabled=True),
    ]),
    dcc.Textarea(
        id=textbox-population,
        placeholder='Select a single row to query in the datatable',
        value=None,
        style={'width': '40%'}
    )
    
    # +++++++++ END UPDATED APP LAYOUT FOR QUERY BUTTON ++++++++++
], style={'width': '60%'})