Multiple callbacks sharing a variable

Dash Python
2

See Add reactive expressions / blocks · Issue #49 · plotly/dash · GitHub for now. Copied from that link:

global_df = pd.read_csv('...')
app.layout = html.Div([
    dcc.Graph(id='graph'), 
    html.Table(id='table'),
    dcc.Dropdown(id='dropdown'),
    html.Div(id='intermediate-value', style={'display': 'none'})
])

@app.callback(Output('intermediate-value', 'children'), [Input('dropdown', 'value')])
def clean_data(value):
     # some expensive clean data step
     cleaned_df = your_expensive_clean_or_compute_step(value)
     return cleaned_df.to_json() # or, more generally, json.dumps(cleaned_df)

@app.callback(Output('graph', 'figure'), [Input('intermediate-value', 'children'])
def update_graph(jsonified_cleaned_data):
    dff = pd.read_json(jsonified_cleaned_data) # or, more generally json.loads(jsonified_cleaned_data)
    figure = create_figure(dff) 
    return figure

@app.callback(Output('table', 'children'), [Input('intermediate-value', 'children'])
def update_table(jsonified_cleaned_data):
    dff = pd.read_json(jsonified_cleaned_data) # or, more generally json.loads(jsonified_cleaned_data)
    table = create_table(dff) 
    return table

Also, how do I get rid of those command buttons on top of all my graphs?

See Is it possible to hide the floating toolbar? - #7 by chriddyp