[Python] How to open url from altair chart in a new tab (href)

I've made an altair scattered chart with links. It works perfectly from my Jupyter Notebook. Problems start when altair is in Streamlit environment. As I investigated, my app with altair chart is displayed by iframe. The link target cannot be displayed within iframe (server refuses these connections).

It all works properly when I Ctrl+Click the link and it opens in new tab. How can I make opening as a new tab a default here? I see this topic discussed here: https://github.com/altair-viz/altair/issues/1661 but I don't know how to use instructions included there :-(

How should I change my chart specification?

My chart code:

import pandas as pd
import altair as alt

#Analyzed data is here:
URL='https://dl.dropboxusercontent.com/s/blk95gc1bf8errv/Car_Prices_Poland_BS4_1_0.csv'

tabela = pd.read_csv(URL)
tabela['calymodel'] = tabela['mark'] + ' ' + tabela['model']
calymodelunique = tabela['calymodel'].unique()
domyslny_model = calymodelunique.tolist().index('volkswagen passat')



auto = 'volkswagen passat'
auto_wiersze = tabela[tabela['calymodel']==auto]
marka_wybrana = auto.split()[0]
model_wybrany = auto.split()[1]


quant_cen = auto_wiersze['price'].quantile(q=0.99)
quant_mil = auto_wiersze['mileage'].quantile(q=0.99)

scattered = alt.Chart(auto_wiersze).mark_point().encode(
x=alt.X('price',scale=alt.Scale(domain=(0,quant_cen),clamp=True), title='Cena [zł]'),
y=alt.Y('mileage',scale=alt.Scale(domain=(0,quant_mil),clamp=True), title='Przebieg [km]'),
color=alt.Color('year', scale=alt.Scale(scheme='tableau10'),bin=alt.Bin(maxbins=6),legend=alt.Legend(title="Przedziały roczników")),
tooltip=[alt.Tooltip('year',title='Rocznik'),
alt.Tooltip('mileage',title='Przebieg'),
alt.Tooltip('price',title='Cena'),
alt.Tooltip('link',title='Link')],
href='link:N',



).properties(title="Porównanie ceny w zależności od rocznika i przebiegu",
height=600)

scattered


For the moment I use Ctrl+Click to follow the link, but I don't think it's user friendly option.

My app is available here: https://share.streamlit.io/napierajpl/streamlit/bs4/streamlit1.py

You can see it crashes when you click on link on first chart :-( Otomoto.pl server reply is: Connection refused

Continue reading...