Streamlit altair / line charts

line_charts.py

## linechart

st.subheader('Comparision of infection growth')
total_cases_graph  =alt.Chart(subset_data).transform_filter(
   alt.datum.total_cases > 0  
).mark_line().encode(
    x=alt.X('date', type='nominal', title='Date'),
    y=alt.Y('sum(total_cases):Q',  title='Confirmed cases'),
    color='Country',
    tooltip = 'sum(total_cases)',
).properties(
    width=1500,
    height=600
).configure_axis(
    labelFontSize=17,
    titleFontSize=20
)

st.altair_chart(total_cases_graph)