Droptdown with mullti selectable years

[celia]

Hi Mae.

I am not sure I completely understand what you want, but maybe this is it?

import plotly.express as px
import pandas as pd
import plotly.graph_objects as go
from plotly.subplots import make_subplots

data = px.data.stocks()[['date', 'GOOG']]
data['year'] = pd.to_datetime(data['date']).dt.year.astype(str)
data['month'] = pd.to_datetime(data['date']).dt.month
data['ym'] = pd.to_datetime(data['date']).apply(lambda x: str(x.year)+'_'+f'{x.month:02}')

data.drop_duplicates(['year', 'month'], keep='last', inplace=True)

selected_years = ['2018', '2019']

fig3 = make_subplots(specs=[[{"secondary_y": True}]])

fig3.add_trace(
    go.Bar(
        x=data[data.year == selected_years[0]]['month'], 
        y=data[data.year == selected_years[0]]['GOOG'], 
        name=selected_years[0],
        offsetgroup=1
        ),
    secondary_y=False,
)

fig3.add_trace(
    go.Bar(
        x=data[data.year == selected_years[1]]['month'], 
        y=data[data.year == selected_years[1]]['GOOG'], 
        name=selected_years[1],
        offsetgroup=2
        ),
    secondary_y=True,
)

fig3.show()

If that’s the case, this post might be helpful too: Group bar chart with secondary y axis in plotly by python - #5 by jawabutt

The other option would be:

# OPTION 2
fig2 = px.bar(data_frame=data, x='ym', y='GOOG', color='year')
fig2.show()

I hope this helps!