Update app.py

app.py

@@ -2,6 +2,8 @@ import streamlit as st
 import pandas as pd
 import altair as alt
 
+st.set_page_config(layout="centered")
+
 # Load data
 url = "https://raw.githubusercontent.com/UIUC-iSchool-DataViz/is445_data/main/building_inventory.csv"
 df = pd.read_csv(url)
@@ -21,7 +23,7 @@ chart1 = alt.Chart(df).mark_bar().encode(
     tooltip=['County', 'mean(Square Footage):Q']
 ).properties(width=600, height=400)
 
-st.altair_chart(chart1)
+st.altair_chart(chart1, use_container_width=True)
 
 # Write-up for Plot 2 
 st.markdown("#### Write-up for Visualization 1")
@@ -50,7 +52,7 @@ chart2 = alt.Chart(usage_count.head(10)).mark_bar().encode(
     tooltip=['Usage', 'Count']
 ).properties(width=600, height=400)
 
-st.altair_chart(chart2)
+st.altair_chart(chart2, use_container_width=Tru)
 
 # Write-up for Plot 2 
 st.markdown("#### Write-up for Visualization 2")