Update app.py

app.py

@@ -1,10 +1,14 @@
-
 import streamlit as st 
 import pandas as pd 
 import plotly.express as px 
 
 st.title('Random Population Dataset and Treemap')
 
+# Upload CSV 
+uploaded_file = st.file_uploader("Upload CSV file here", type="csv")
+if uploaded_file is not None:
+    data = pd.read_csv(uploaded_file)
+
 # Generate random population dataset 
 data = pd.DataFrame({
     'Country': ['USA', 'China', 'India', 'Japan', 'Germany'],