How to plot when we have dropdown menu with multiple selections?

Hello, I am pretty new to dash plotly. I am trying to create a dropdown menu with multiple selections ON. I have a dataframe with the column names [‘col1’, ‘col2’, ‘col3’, ‘col4’, ‘col5’]. I want to plot this dataframe to have ‘col5’ in the y-axis, and the rest of the columns in the dropdown menu for the x-axis selection. I want to add any of these columns to my x-axis as I selected them from the dropdown menu.
I cannot understand what I need to modify to make it work. I checked the published posts here but I couldn’t figure it out.
I get “Callback error updating mygraph1.figure” when I run my code below:

import dash_bootstrap_components as dbc
import pandas as pd
import as px
from dash.exceptions import PreventUpdate

df = pd.read_csv('test.csv')

app = Dash(external_stylesheets=[dbc.themes.SUPERHERO])

app.layout = dbc.Container([
                         multi= True,
        ], width=4),

            dcc.Graph(id='mygraph1', figure={})
        ], width=4),

], fluid=True)

    Output('mygraph1', 'figure'),
    Input('mydd1', 'value'),

def update_title(X):
    if X is None:
        raise PreventUpdate

    fig1 = px.line(df, x=df[X], y=df['col5'])
    return fig1

if __name__ == "__main__":
    app.run_server(debug = True, port=8055)```

Hi @Peyman,

Welcome to the forums.

Your code is fine, just one small bug:

change from
fig1 = px.line(df, x=df[X], y=df['col5'])

fig1 = px.line(df, x=X, y='col5')

Since you are specifying the df in the beginning, x and y are actually the column names.


Thank you, that worked perfectly.