How to update slicer.graph with other vol

Dash Python
1

I want to change te vol info and update the slider.graph with a callback, but it doesnt work. How can i solve this?

#--------------------------------Ejemplo sencillo
import dash
import dash_html_components as html
import imageio
import dash_bootstrap_components as dbc
from dash_slicer import VolumeSlicer
from dash import Dash, dcc, html, Input, Output

app = dash.Dash(name, update_title=None)

vol = imageio.volread(“eje1.npz”)
slicer = VolumeSlicer(app, vol)
slicer.graph.config[“scrollZoom”] = False

app.layout = dbc.Container([

                  dbc.Row([
                      dbc.Col([
                          dcc.Dropdown(id="slct_30",
                                        options=[
                                            {"label": "PRIMER", "value": 1},
                                            {"label": "SEGUNDO", "value": 2},
                                            {"label": "TERCERO", "value": 3},
                                            {"label": "CUARTO", "value": 4}],
                                        multi=False,
                                        value=1,
                                        style={'width': "80%"}
                                        )
                      
                          
                      ],width={'size':5, 'offset':5},),
                  ]),
                  dbc.Row([
                  html.Div([
                          
                          html.Br(),                  
                          slicer.graph, 
                          slicer.slider,
                          *slicer.stores
                        ]),
                    ])

])

@app.callback(
# [Output(component_id=‘output_container’,component_property=‘children’)],
[Output(slicer.graph.id, component_property=‘figure’)],
# [Output(slicer.slider.id, component_property=‘figure’)],
[Input(component_id=‘slct_30’, component_property=‘value’)]
)
def update_graph(option_slctd):

    print(option_slctd)
    print(type(option_slctd))
    container = "LAPSO DE 30 MINUTOS: {}".format(option_slctd)
    
    vol = imageio.volread("eje"+option_slctd+".npz")
    nslicer = VolumeSlicer(app, vol)
    nslicer.graph.config["scrollZoom"] = False 
    
    
    
    return nslicer.graph
    # return container

if name == “main”:
app.run_server(debug=True, dev_tools_props_check=False)