How to use the parsl.monitoring.web_app.app.app.callback function in parsl

    @app.callback(Output('page_content', 'children'),
                  [Input('url', 'pathname')])
    def display_page(pathname):
        if pathname == '/':  # TODO Redirect to workflows or show special page
            pass
        elif pathname == '/workflows':
            return workflows.layout
        elif '/workflows' in str(pathname):
            pathname_split = pathname.split('/')
            run_id = pathname_split[pathname_split.index('workflows') + 1]
            if run_id and re.fullmatch(RUN_ID_REGEX, run_id):
                return nav_bar.display_workflow(run_id=run_id)
            else:
                return'Invalid run id'
        else:
            return '404'

@app.callback(Output('tasks_details', 'children'),
              [Input('run_id', 'children')],
              [State('url', 'pathname')])
def tasks_details(run_id, pathname):
    sql_conn = get_db()
    df_task = pd.read_sql_query('SELECT task_id, task_func_name FROM task WHERE run_id=(?)',
                                sql_conn, params=(run_id,))
    close_db()

    tasks = []
    for task_id in df_task['task_id']:
        tasks.append({'label': task_id, 'value': task_id})

    return [html.P(className='view_title', children='Tasks view'),
            html.Div(id='select_task_id',
                     children=[
                         html.H4('Select Task ID'),

@app.callback(Output('workflow_details', 'children'),
              [Input('run_number_dropdown', 'value')])
def workflow_details(run_id):
    return [html.A(id='run_id', children=run_id, hidden=True)] + [plot.html for plot in plots]

@app.callback(Output('tabs-content', 'children'),
              [Input('tabs', 'value')])
def render_content(tab):
    if tab == 'workflow':
        return workflow_details.layout
    elif tab == 'tasks':
        return tasks_details.layout

@app.callback(Output('tasks_per_app_plot_tasks', 'figure'),
              [Input('apps_dropdown', 'value')],
              [State('run_number_dropdown', 'value')])
def tasks_per_app_plot_callback(apps, run_id):
    if type(apps) is dict:
        apps = ['', apps['label']]
    elif len(apps) == 1:
        apps.append('')

    sql_conn = get_db()
    df_status = pd.read_sql_query('SELECT run_id, task_id, task_status_name, timestamp FROM task_status WHERE run_id=(?)',
                                  sql_conn, params=(run_id, ))
    df_task = pd.read_sql_query('SELECT task_id, task_func_name FROM task WHERE run_id=(?) AND task_fn_hash IN {apps}'.format(apps=tuple(apps)),
                                sql_conn, params=(run_id, ))
    close_db()

    def y_axis_setup(array):

@app.callback(Output('apps_details', 'children'),
              [Input('run_id', 'children')])
def tasks_details(run_id):
    sql_conn = get_db()
    df_task = pd.read_sql_query('SELECT task_id, task_func_name FROM task WHERE run_id=(?)',
                                sql_conn, params=(run_id,))
    close_db()

    apps = []
    for _app in df_task['task_func_name'].unique():
        apps.append(dict(label=_app, value=_app))

    return [html.P(className='view_title', children='Apps view'),
            html.Div(id='select_apps',
                     children=[
                         html.H4('Select apps'),
                         dcc.Dropdown(

@app.callback(Output('workflow_details', 'children'),
              [Input('run_id', 'children')])
def workflow_details(run_id):
    return [html.P(className='view_title', children='Workflow view')] + [plot.html(run_id) for plot in plots]

@app.callback(Output('nav_content', 'children'),
              [Input('url', 'pathname')])
def render_content(pathname):
    if '/workflow-view' in str(pathname):
        return workflow_details.layout
    elif '/apps-view' in str(pathname):
        return apps_details.layout
    elif '/tasks-view' in str(pathname):
        return tasks_details.layout
    else:
        return html.H2('Select a view from the menu above', style=dict(textAlign='center'))

        @app.callback(Output(plot_id, 'figure'), plot_input_args, plot_state_args)
        def plot_callback(*args):
            return plot(*args)