Update app.py

app.py

@@ -8,6 +8,7 @@ from geopy.exc import GeocoderTimedOut
 from streamlit_folium import st_folium
 import folium
 from branca.colormap import LinearColormap
+import base64
 
 # Function to add heatmap layer to folium map
 def add_heatmap_layer(map_obj, data, column_name, colormap_name, radius=15):