Update single dropdown options based on multiple inputs

Dash Python
4

Yes, it is very clear. I imagine that season_data has “Team” and “Position” as columns, so what you want is something like:

@app.callback(
    Output("player-filter", "options"),
    [
        Input("season-filter", "value"),
        Input("team-filter", "value"),
        Input("pos-filter", "value")
    ])
def update_player_filter(season, team, position): 
     dff = season_data[season_data["Season"].isin(season)] if season else season_data
     dff = dff[dff["Team"].isin(team)] if team else dff
     dff = dff[dff["Position"].isin(position)] if position else dff
     return [{'label': i, 'value': i} for i in dff["Player"].unique()]

Here I am explicitly using that an empty selection should return all seasons/teams/positions, because otherwise the user would need to select all one by one (there is no “select all” options). Of course, you could in principle add a “All” option in each dropdown and handle this case separately.